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You cannot use an array function that returns a variable-size array in an FPGA VI. However, if you use appropriate constants with many array functions, the resulting array is fixed-size.

The following Array functions can return fixed-size arrays:

Note  Build Array, Cluster To Array, and Initialize Array functions require that the Autopreallocate arrays and strings checkbox have a checkmark. To ensure this option is enabled, right-click the FPGA VI under the FPGA target that you are using. Select Properties in the shortcut menu. The VI Properties dialog box appears. Select Execution from the Category pull-down menu. Confirm the Autopreallocate arrays and strings checkbox is enabled and click the OK button.

• Array Subset—The index and length inputs must be constant. You also can make all inputs constant.
  
  
• Build Array—You can use constant or non-constant inputs.
  
  
• Cluster To Array—You can use constant or non-constant inputs.
  
  
• Decimate 1D Array—You can use constant or non-constant inputs.
  
  
• Delete From Array—The length and index inputs must be constant. You also can make all inputs constant.
  
  
• Initialize Array—The element input can be non-constant. The dimension size input must be constant. You also can make all inputs constant.
  
  
• Insert Into Array—The index input must be constant. You also can make all inputs constant.
  
  
• Interleave 1D Arrays—You can use constant or non-constant inputs.
  
  
• Replace Array Subset—You can use constant or non-constant inputs.
  
  
• Reshape Array—The dimension size input must be constant.
  
  
• Reverse 1D Array—You can use constant or non-constant inputs.
  
  
• Rotate 1D Array—You can use constant or non-constant inputs.
  
  
• Split 1D Array—The index input must be constant. You also can make all inputs constant.
  
  

Note  Use constant inputs when you can because they are more efficient in FPGA VIs.