IBM Mainframe Forum

while searching about the abend SOC4, i found
Movingdata to a zero address or to an address less than 512 (decimal) is a very frequent cause of this abend.

Can anyone tell me what does 512(decimal) means here?

Exactly what it says - an address less than 512. Such a low address is reserved by/for the operating system

see here for the details of hardware architecture
http://www-01.ibm.com/support/docview.w ... c500428f9a

Hello,

Can anyone tell me what does 512(decimal) means here?

As said above, a memory address below 512.

It means the code has attempted to move data to an address that is not valid to move to by the code.

priyasingh,

Can you post where you got that from, please? I've seen a good few S0C4's in my time (caused by program code, rather that doing dumb things with a file which, to be honest, I've never looked at the address of), but other than a zero address, I've never seen one that bore any relationship to and address of "512" or lower and non-zero. Although easy to get a zero address in Cobol, getting an address of 1-512 would be much more tricky, except doing it deliberately.

S0C4 is from accessing storage that in some way you don't have "permission" to address - it is not "your storage" according to the OS (and there is no arguing with it).

So, it is something according to Chicago Soft's Quik-Ref product.

The 512 is like this: X'0000FF' or X'000000FF' through X'000000' or X'00000000'.

The zero address is easy to create (try to use something which has not had an address established). The X'01'-X'FF' would be difficult to get by accident in Cobol.