error during zload

We're using RTC 4.0.5 in order to manage our z/OS developments.
When we need to change a source (for example a COBOL) we follow the traditional method
1 - create a z/os project
2 - create a MVS subsystem
3 - zload the source from developer workspace to MVS subsystem

The zload operation apparently ends without problems and the source is transferred on partitioned dataset specified but on Error Log view we can find this error
ZOSResourceImpl#mvsResourceCodePageChanged - Shared resource is not a IFile: L/zComponent_D40.PROG.SOURCE/zOSsrc/PROG.SOURCE/D40030R0.cbl

The error occurs with all the sources transferred.
Which is the cause of this error?
 
Thanks in advance.
Bye.