John, Was this a new device that you added to your system? I'm wondering if maybe there was already spool information on the FBA volume that was erased when you did the CPFMTXA. But if that were the case, you should get the same error regardless of whether you are running in 32 or 64 bit mode.
Are you using a program to read the spool area or just CP commands? If you are using a program, make sure in 64-bit mode that the high halves of the registers are zero. Otherwise you may be looking at a different place on the volume (or even a different volume) than you think you are. If you don't come up with anything, give the Support Center a call. Reading and writing spool should work in both 32 and 64-bit modes. John Franciscovich z/VM Development
