What causes TSSXTEND to receive a U3006 abend error 075?
U3006 abend error 075 can occur for the following reasons:
1) The live security file was used as inout for the TSSXTEND job. TSSXTEND should be run using the backup security file as input; it should never use the live security file.
2) The backup file was correctly used as input for TSSXTEND but while running the TSSXTEND job a backup of the primary security file was taken.