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The Timed Loop structure and 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
−823	Cannot load scheduler library on the target.
−822	The timed structure feature or type is not supported on the current platform for the following timing source.
−821	The following timed structures timed out while waiting for the synchronization group to synchronize all timed structures in the group.
−820	The following timed structure has been initialized with illegal parameters.
−819	An illegal mode has been specified for the following given Timed Loop.
−818	An illegal period, priority, deadline, offset, or start has been specified for the following timed structure.
−818	An illegal period, priority, deadline, offset, or start has been specified for the following timed structure.
−817	Timing Source error or attempted to execute another iteration of a Timed Loop that was already aborted due to an error of the following timing source.
−816	Timed structure aborted or attempted to execute another iteration of the following aborted Timed Loop.
−815	Cannot add timing source to the following active timing source hierarchy.
−814	Cannot add timed structure to the active timed structure synchronization group.
−813	The following timing source can be assigned to only one timing source hierarchy at a time.
−812	The following timed structure can only be assigned to one timed structure synchronization group at a time.
−811	The given name is already being used by another timing source hierarchy:
−810	The given name is already being used by another timed structure synchronization group:
−809	The given name is already being used by the following timing source.
−808	The given name is already being used by the following timed structure.
−807	LabVIEW: The following timing source hierarchy does not exist possibly because the timing source hierarchy has never been created, has been cleared, or an illegal action was attempted.
−806	LabVIEW: The following synchronization group does not exist possibly because the synchronization group has never been created, has been cleared, or an illegal action was attempted.
−805	LabVIEW: The following timing source does not exist possibly because the timing source was never created, has been cleared, or an illegal action was attempted.
−804	The timed structure does not exist, possibly because the timed structure has not been created, the timed structure has been cleared, or an illegal operation was attempted.
−803	Creating a new timing source hierarchy exceeds the maximum allowed number of simultaneously active timing source hierarchies.
−802	Creating another timed structure synchronization group exceeds the maximum allowed number of simultaneously active synchronization groups.
−801	Creating another timing source exceeds the maximum allowed number of simultaneously active timing sources.
−800	Creating another timed structure exceeds the maximum allowed number of simultaneously active timed structures.
824	You must supply a mode to change the offset of the Timed Loop.