0x0015000E (1376270) The System Log Stream (SLS) interface encountered an error while it was connecting to a log stream for write access.

Explanation
An attempt to connect to a z/OS system log stream failed for write access. 

The data values identify the return and reason code values from the IXGCONN REQUEST=CONNECT AUTH=WRITE 
request that reported the error.

User response

Review the topic, "IXGCONN — Connect/disconnect to log stream" in the “MVS Programming: Authorized Assembler 
Services Reference” in the z/OS documentation in IBM Knowledge Center for an explanation of these codes.