3C4

Explanation
During system processing, an internal system request
encountered an unexpected error.
Register 15 contains a hexadecimal
reason code. Code
Explanation
00000001
Recovery routine (ESTAEX) could not be established.
00000002
The request came from an unauthorized program.
00000003
Not enough storage was available.
00000004
POST returned an an error code.
00000005
ATTACH did not complete successfully.
00000006
LXRES did not complete successfully.
00000007
AXSET did not complete successfully.
00000008
Too many ETEs (entry table entries).
00000009
Incorrect EX (entry index)
0000000A
ARR (associated recovery routine) not found.
0000000B
A PC integrity error occurred.
0000000C
A PC provided an incorrect attribute.
0000000D
ETCRE did not complete successfully.
0000000E
ETCON did not complete successfully.
0000000F
An unexpected error occurred.
00000010
ENQ did not complete successfully.
00000011
Start was incorrect.
00000012
The SSCVT was incorrect.
00000013
The DSCT was incorrect.
00000014
Dispatcher control blocks were incorrect.
00000015
ALESERV did not complete successfully.
00000016
DSPSERV did not complete successfully.
00000017
IEFJSVEC did not complete successfully.
00000018
A required routine could not be found.
00000019
RESMGR did not complete successfully.
0000001A
Recovery was entered and there was no available entry on the dynamic
area stack for the recovery routine to use.
0000001B 
The stack storage has been used up.

System action
If the error occurred during address space initialization,
the initialization process terminates.

Programmer response
Search problem reporting data bases for
a fix for the problem. If no fix exists, contact the IBM® Support Center, providing the reason code
 that accompanies the abend.

Source
MVS™ reuse