TPRESTNESTERR, TP restart signaled while handing error - treated as nested error - Use TROLLBACK in error handler to avoid this
Run Time Error: GT.M does not allow a TP restart to occur either explicitly or implicitly while doing error processing ($ECODE is not NULL). Note that if a $ZINTERRUPT interrupts an error handler, this restriction then extends to the $ZInterrupt code even though $ECODE is temporarily nullified for the duration of the $ZInterrupt.
Action: Doing a TROLLBACK in the error handler before attempting to set any globals avoids this error.
