Countermeasure	Note 1	Error Solution
VRT number cannot be cleared while in use. Stop the task and do one of the following. - Select a VRT number other than the one you want to specify. - Check the VRT number specified in the SPEL command. Targets are the commands corresponding to the function name and row number in the system history. See the reference manual for correction instructions.	The VRT number you attempted to clear	Stop task