CQM905E An unexpected return code from VSAM was encountered while doing a read of the control file.

Explanation
 A VSAM READ error occurred while attempting to access the data set specified for the Db2 control
                file. The VSAM return code is provided for diagnostic purposes.

User response
 Refer to the z/OS® DFSMS Macro Instructions
for Data Sets (SC26-7408) documentation to resolve, and then
continue.