"No such file or directory" message of source command

Issue

• In csh, when a file that does not exist is specified by source command, path of the specified file is not displayed in "No such file or directory" message.

  [root@localhost test]# cat a.csh
  #!/bin/csh

  source ./b.csh

  [root@localhost test]# ls
  a.csh
  [root@localhost test]# ./a.csh
  .: No such file or directory.

• Moreover, "No such file or directory" message is as follows for Japanese.

  [root@localhost test]# ./a.csh
  /usr/share/locale/ja_JP.UTF-8/LC_MESSAGES/libc.mo:<snip>

• What is the root cause of this problem?
• Is there Workaround of this problem?