The CA Master Address Space is initiated at IPL and remains active during the life of the IPL. What causes a Common Services to issue a CAMS301E message indicating BLDL errors when CA Master Address space starts?
CA Common Services r15.0
CA Master encountered a BLDL service failure locating a module.
CAMS301E BLDL errors at IPL time indicate that there is a problem attempting to locate and load the specified module(s). It provides information for support to diagnose possible problems. Verify that the CA Master component have been installed in a linklisted library.
See the CAMS301E message found in the r15.0 Common Components for z/OS Messages Guide.