FUNL0003 GETMAIN request failed, RC=(n). Run terminated.

This indicates that there is not enough storage in the region or address space to satisfy or free storage request. This could be caused by running in too small of a region or address space, or requesting too many buffers. Either increase the amount of virtual storage available to Fast/Unload or decrease the number of required buffers. Parameters which significantly affect the amount of virtual storage required are NOBUFF, NEBUFF and NBBUFF.