| Return Code | Reason Code | Description of Cause | Action | 
|---|---|---|---|
| 400 | Bad request type | TYPE=ALLOCERR: Request type is invalid | The first packet's request type must be ALLOC. Resubmit an ALLOC packet. | 
| 400 | Bad request, ID block is missing | TYPE=ALLOCERR: Mainframe Access does not have the configuration for the IMSID | Check the IMSID and resubmit. | 
| 505 | Version not supported | TYPE=ALLOCERR: The client is not supported by Mainframe Access | Contact our Product Support. | 
| 602 | IMS Applid is not valid | TYPE=ALLOCERR: Either IMS is not available or IMS/APPC is not enabled. | Contact our Product Support. | 
| 604 | IMS Alloc Failure, RC = rc | TYPE=ALLOCERR: Routine failed to initiate a conversation with the target IMS system. rc is the decimal number of the return code from VTAM. | Contact our Product Support. | 
| 606 | Receive Error | TYPE=RPL,CODE=rc: Conversation to IMS has failed during a receive operation with RPL code. rc is the return code. The first two bytes are the RPL primary code; the next two bytes are the RPL secondary code. | Check the entries, correct any errors, and resubmit request. | 
| 606 | Send Error | TYPE=RPL,CODE=rc: Conversation to IMS has failed during a send operation with RPL code. The first two bytes are the RPL primary code; the next two bytes are the RPL secondary code. | Check the entries, correct any errors, and resubmit request. | 
| 606 | LU6.2 Error | TYPE=RPL,CODE=rc: Conversation to IMS has failed with RPL code. The first two bytes are the RPL primary code; the next two bytes are the RPL secondary code. | Check the entries, correct any errors, and resubmit request. | 
| 613 | Userid/Password Required | TYPE=ALLOCERR: Security is enforced in the configuration and user ID or password in the request packet is missing. | Check and correct user ID and password and resubmit request packet. | 
| 699 | Mainframe Access HTTP Parsing Error | TYPE=ALLOCERR: The input HTTP packet has invalid record or format. | Check the record or format of the HTTP packet and resubmit. |