# Error Messages Related to QUEUE-READ and QUEUE-DELETE Requests

Potential Error Messages

Below you find a list of the error messages that may occur exclusively in relation with the processing of QUEUE-READ or QUEUE-DELETE requests.

Comments on the Table

- The “Input Format” column indicates whether the error message can occur when using the key/value format (= KV) and/or XML format (= XML).
- The “Read / Delete” column indicates whether the error message can occur when reading (= R) and / or deleting (= D) a message.

Error Code | Error Message | Input Format | Read / Delete | Brief Description
--- | --- | --- | --- | ---
63600063502 | Inadmissible value for keyword "MsgType" | KV / XML | R/D | The specified MsgType does not exist.
63650063607 | This message is not the oldest | KV / XML | D | Only the oldest message in the queue can be deleted at any one time; however, the specified message is not the oldest.
63650063609 | MsgId does not exist | KV / XML | D | The specified MsgId does not exist.
63650043610 | Keyword "MsgId" cannot be recognized | KV / XML | D | The keyword “MsgId” is missing or cannot be recognized.

For orders in XML format, a schema validation error occurs if a “MsgId” is not recognized, see chapter Description of Data Formats (Key/Value / XML), section "Validation Errors in XML Requests".