For those interested in exploring the topic further, we've compiled a list of resources and references:
Review the XCOM Started Task (STC) logs and your security system logs (e.g., Top Secret, RACF). Look for accompanying messages like TSS7100E or TSS7171E which specify the reason, such as "Invalid source" or "Unauthorized Source of System Entry". xcomm0257e
To resolve this issue, you must identify exactly why the security interface is blocking the request: For those interested in exploring the topic further,
To resolve the xcomm0257e error code, follow these troubleshooting steps: This message typically appears when the security subsystem
The error code indicates "ACCESS DENIED BY SECURITY INTERFACE" within CA XCOM Data Transport for z/OS. This message typically appears when the security subsystem (like Top Secret, ACF2, or RACF) rejects a transfer request due to insufficient permissions or environmental restrictions. Understanding the Error