Fatal error issuing CALCULATE command

Hi all

I think I have come across a possibly undocumented limitation to the maximum number of expressions in a CALCULATE command. In my case a fatal error occurred when trying to CALCULATE the SUMs of 32 different fields in a cursor. It took a while to establish what was going on, but when I reduced the number of expressions to 31 the error no longer occurred.

Has anybody else encountered this issue? Many thanks

Paul Newton