2601 Stack overflow calculating expression involving %TVMID.%FLDID.
This error occurs because an expression employs too many stack push operations. The maximum stack depth is eight. The tablename and columnname identified are those of the last fields accessed in forming the stack entries.
The interpretative instruction processor.
The TvmId and FldId can be from the source or target row.
Resubmit the request using an expression that does not nest as many levels as the expression that caused the error.