Attempted to execute an invalid op code

• Attempted to execute a DS or DC statement

• The code was accidentally overwritten

A D(B) or D(X,B) address resolved to an absolute address that it outside of the program

• An index or base register contains an excessively large number

• An index or base register was inadvertently changed

Possible Solution

1. Look at the ABENDing instruction

2. Look left. Did the instruction encode correctly? (ie. did the assembler pick the correct base/index registers?)

3. Look at the contents of the base/index registers. Are they correct?

4. Check the program dump to see if the ABENDing instruction was altered

A D(B) or D(X,B) address resolved to an absolute address that is greater than FFFFFF

• An index or base register contains an excessively large number

• An index or base register was inadvertently changed

Possible Solution

1. Same as SOC4 error

A D(X,B) address on an RX instruction resolved to an absolute address that is not on a fullword boundary

• An index or base register contains an invalid number

Possible Solution

1. Make sure that the label that was used as the 2nd operand is on a fullword boundary

2. Same as SOC4 error

Ran out of the time alloted to execute the program

Infinite Loop

Exceeded the maximum number of lines available for printing output

Infinite Loop