An error was encountered during virtual storage access method (VSAM) open, close, or action request processing, as indicated in the text of the message.
The return code, as follows:
For a Logical I/O Error
Data set cannot be extended because VSAM cannot allocate additional direct-access storage space. Either there is not enough space left to make the secondary allocation request, you attempted to increase the size of a data set while processing with SHROPT=4 and DISP=SHR, or the index CI is not large enough to hold the entire CA. This error could also be due to a data set trying to extend beyond 4GB on a system that does not support extended addressability.