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The Signal Processing VIs and VI Server properties and methods can return the following error codes. Refer to the KnowledgeBase for more information about correcting errors in LabVIEW.

Code	Description
−20337	The specified time stamp is after the end of the limit.
−20336	Values of the X array contained in the Limit Specification cluster are not monotonically increasing.
−20335	Waveforms are not contiguous. You can concatenate two waveforms (A, B) with same dt only if they are contiguous, that is if t0_B = t0_A + N * dt, where N is the number of samples of waveform A.
−20334	Cannot align waveforms because their time stamps are separated by more than 10 times the duration of the longest waveform.
−20333	Cannot align two waveforms with same dt if their samples are not clocked in-phase. Alignment of two waveforms is possible only if the samples share the same dt and are in-phase, that is the difference between their t0s is a integer multiple of dt.
−20332	Internal error: The number of threads attribute is less than zero. If the problem persists, contact National Instruments technical support.
−20331	Internal error: The parameter struct pointer is Null, possibly because of changes to the calling VI block diagram. If the problem persists, contact National Instruments technical support.
−20330	Internal error: The cursor struct pointer is Null, possibly because of a change to the calling VI block diagram. If the problem persists, contact National Instruments technical support.
−20329	Internal error: The result pointer is Null, possibly because of changes to the calling VI block diagram. If the problem persists, contact National Instruments technical support.
−20328	Failure initializing a critical section in measurement code, possibly due to low memory. If the problem persists, contact National Instruments technical support.
−20327	An exception occurred in the measurement code, possibly due to low memory. If the problem persists, contact National Instruments technical support.
−20326	Internal error: Invalid measurement ID number. Contact National Instruments technical support.
−20324	The edge number, pulse number, or cycle parameter value must be greater than zero.
−20323	Internal error: The attribute number does not refer to a valid parameter. Check the input parameters reference levels, percent level settings, and state settings.
−20322	Internal Error: The measurement session handle is invalid. If the problem persists, contact National Instruments technical support.
−20321	Internal error: The requested measurement is not available. If the problem persists, contact National Instruments technical support.
−20320	The period of the waveform is too short to perform the measurement.
−20319	The result is not a number (NaN) or infinite.
−20318	The histogram size parameter value is less than or equal to zero.
−20317	The slew rate is infinite because the rise or fall time is zero.
−20316	Illegal percent method parameter. Check the method enum input.
−20315	The waveform dt parameter is ≤ 0.
−20314	Illegal reference level units parameter. Check the ref units text ring input.
−20313	Reference levels must satisfy: low ref ≤ mid ref ≤ high ref.
−20312	The input waveform size is zero.
−20311	Insufficient memory available for waveform measurement.
−20310	The waveform did not have enough edges to perform this measurement. An edge is defined as a crossing of both the low and high reference levels. Check the signal length, reference levels, and ref level units.
−20309	The amplitude of the waveform is zero, so the histogram method cannot be used.
−20308	The waveform did not cross the mid reference level enough times to perform this measurement. Check the signal length, reference levels, and ref level units.
−20307	Frequency not a multiple of (Sampling Rate)/Samples.
−20306	The two time signal waveforms contain different dt.
−20305	The two time signal waveforms contain different number of data points.
−20304	At least one of the time signal waveforms does not contain the correct dt to continue the averaging process.
−20303	At least one of the time signal waveforms does not contain the correct number of data points to continue the averaging process.
−20302	The time signal waveform does not contain the correct dt to continue the averaging process.
−20301	The time signal waveform does not contain the correct number of data points to continue the averaging process.
−20119	The number of samples is not equal to three.
−20118	The input is greater than 1 or less than -1.
−20117	Loss of Significance Computation failed due to loss of significance.
−20116	Feasible solution not found.
−20115	The FFT size must be greater than zero.
−20114	The start value wired to the Polynomial Real Zeros Counter VI is greater than the end value. Verify the values you wired to the Polynomial Real Zeros Counter VI.
−20113	The end value wired to the Polynomial Real Zeros Counter VI is a root.
−20112	The start value wired to the Polynomial Real Zeros Counter VI is a root.
−20111	The input polynomial coefficients are all zeros.
−20104	Input parameters have at least one NaN element.
−20103	The order must be greater than or equal to zero.
−20102	The shifts must meet: |shifts| < samples.
−20101	Parameter must meet the condition Top > Base
−20099	The AR order must be greater than or equal to the number of complex sinusoids.
−20098	The AR order must not be greater than two-thirds of the number of samples.
−20097	The number of complex sinusoids must not be greater than two thirds of the number of samples.
−20096	The AR order must be > 0.
−20095	The number of complex sinusoids must be > 0.
−20094	The size of the initial or final condition array is not correct.
−20093	df must be > 0.
−20092	The dual function does not exist.
−20091	The Gabor coefficient array does not have the correct dimension.
−20090	The order of the Gabor spectrogram must be ≥0.
−20089	The oversampling rate, N / dM, must be ≥1.
−20088	The length of the analysis or synthesis window must be evenly divisible by the number of frequency bins, N, which must be a power of 2.
−20087	The length of the analysis or synthesis window must be evenly divisible by the Gabor time sampling interval, dM.
−20086	Window length must be > 2 and a power of 2.
−20085	The size of the input array and its Hilbert transform must be equal.
−20084	Time increment must not be greater than (window length)/4.
−20083	Window length must be > 4 and a power of 2.
−20082	Time increment must not be greater than dM.
−20081	dN or time interval must be greater than zero.
−20080	Time increment must be greater than the (window length)/16
−20078	This functionality is not supported on this platform.
−20077	The time points are not in ascending order.
−20076	The resample point cannot be calculated with the signal behind that of the input.
−20075	The filter buffer overflows.
−20074	Reordering eigenvalues changed some complex ones.
−20073	The eigenvalues cannot be reordered because some of them are too close.
−20072	The logarithm of the input matrix cannot be computed.
−20071	The input matrix is not positive definite.
−20070	Matrices must have the same size.
−20069	The number of samples must be greater than or equal to four.
−20068	Input parameters has at least one element that is Inf, NaN, DBL_MAX, or DBL_MIN
−20067	The input fundamental frequency or sampling rate is equal to zero.
−20066	The information in IIR filter structure is not correct.
−20065	The elements in the vector can not be all zero.
−20064	The internal memory state of this function was not initialized correctly.
−20063	The coefficients of the polynomial are invalid.
−20062	The maximum number of iterations was exceeded.
−20061	The selection is invalid.
−20060	Divide by zero error.
−20059	Negative number error
−20058	Invalid number of dimensions or dependent variables
−20057	The parameter to the beta function should be 0 < p < 1
−20056	The contingency table has a negative number.
−20055	The number of categories or samples must be greater than one.
−20054	The probability must be greater than or equal to zero and less than one.
−20053	The number must be between zero and one.
−20052	The degree of freedom must be greater than zero and less than the length of the input sequence.
−20051	All values in the first column of X matrix must be one.
−20050	The interpolating function has a pole at the requested value.
−20049	The x-values must be distinct.
−20048	The Random Effect model was requested when the Fixed Effect model is required.
−20047	The data is unbalanced. All cells must contain the same number of observations.
−20046	There is an overflow in the calculation.
−20045	The total number of data points must be equal to the product of levels/each factor * observations/cell.
−20044	Zero observations were made at some level of a factor.
−20043	The level of factors is outside the allowable range of some data.
−20042	The number of levels is out of range.
−20041	The system of equations cannot be solved because the input matrix is singular.
−20040	The input matrix must be a square matrix.
−20039	The number of columns in the first matrix is not equal to the number of rows in the second matrix or vector.
−20038	The number of intervals must be > 0.
−20037	The number of data points in the Y Values array must be greater than the order.
−20036	The elements of the Y Values array must be nonzero and either all positive or all negative.
−20035	The standard deviation must be greater than zero for normalization.
−20034	The number of coefficients must be even for this filter.
−20033	The number of coefficients must be odd for this filter.
−20032	The left rank of the filter must meet: left rank ≥ 0. The right rank of the filter must meet: right rank < size.
−20031	The filter cannot be designed with the specified input values.
−20030	The leakage coefficient, leak, and step-size parameter, u, must meet: 0 ≤ leak ≤ u.
−20029	The step-size, u, must meet: 0 ≤ u ≤ 0.1.
−20028	The attenuation value must be greater than the ripple amplitude.
−20027	The final value must be > 0.
−20026	The width must be > 0.
−20025	The attenuation must be > 0.
−20024	The ripple amplitude must be > 0.
−20023	The following conditions must be met: 0 < f_low ≤ f_high ≤ fs/2.
−20022	The decimating factor must meet: 0 < decimating factor ≤ samples.
−20021	The order must be > 0.
−20020	The cut-off frequency, fc, must meet: 0 ≤ fc ≤ fs/2.
−20019	The upper value must be ≥ the lower value.
−20018	The following condition must be met: 0 ≤ (index + length) < samples.
−20017	The following condition must be met: 0 ≤ index < samples.
−20016	dt must be > 0.
−20015	dt must be ≥ 0.
−20014	The following conditions must be met: 0 ≤ (delay + width) < samples.
−20013	The width must meet: 0 < width < samples.
−20012	The number of cycles must be > 0 and ≤ the number of samples.
−20011	The duty cycle must be equal to or fall between 0 and 100: 0 ≤ duty cycle ≤ 100.
−20010	The maximum allowable transform size has been exceeded.
−20009	The size of the input array must be a power of two: size = 2^m, 0 < m < 23.
−20008	The input arrays do not contain the correct number of data values for this function.
−20007	The number of samples must be ≥ 3.
−20006	The number of samples must be ≥ 2.
−20005	The number of samples must be greater than or equal to 1.
−20004	The number of samples must be ≥ 0.
−20003	The number of samples must be > 0.
−20002	The input sequences must be the same size.
−20001	There is not enough memory to perform the specified routine.
20001	The matrix is rank deficient.
20002	The number of samples must be greater than zero.
20003	The matrix is singular.
20004	Matrices or vectors do not have the same size.
20006	The computation result might be inaccurate.
20010	The sizes of the input arrays do not meet the specified conditions.
20011	The input standard deviation is invalid.
20012	The input polynomial is empty.
20020	Some frequencies violate Nyquist criteria.
20030	The input matrix has at least one element with a value of Inf or NaN.
20307	Frequency was coerced to the nearest multiple of (sampling rate)/samples.
20334	Waveforms are not overlapping. The time stamp of one waveform is not contained within the duration of a second waveform.
20351	The averaging process was automatically restarted to respond to a change in the averaging parameters.
20352	Current and previous waveforms are not contiguous.
20353	Current and previous dt not equal.