Command CheckError :

Read the error flags and return an error:
bit 1 BraggAxisInErr
bit 2 PerpAxisInErr
bit 3 ParAxisInErr
bit 4 TmOutErrFlag
bit 5 Skipped

CheckError Definition
Input Argument	Tango::DEV_VOID
Output Argument	Tango::DEV_LONG	Error code
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..