C1LB006E message is inconclusive, this FAQ outlines some possible reasons for the message.
The 'C1LB006E library open failed' message does not supply information about the specific cause.
To diagnose the problem, investigate accompanying messages, for example a IEC161I, and the reported RC and SFI in that IBM message.
If the ELIB file is under L-Serv control, check the L-Serv log for LDM error messages.
Possible causes of this error are: