Hello,
It seems that you try to run a test case coming from Cowadis software. I am not a Tomawac user at all, but I think that you cannot use every Cowadis subroutine in current version of Tomawac. If you look for limcow.f or spelim.f files in the sources of the version 6.1 of Tomawac, you will not find them.
When compiling your fortran file, as spelim subroutine does not exist, you get your error.
I think that to start with Tomawac, you should use Tomawac 6.1 test cases and/or subroutines, not old versions.
Hope this helps.
Chi-Tuan
PS: this post should now appear in Tomawac section, but I do not know how to move it in the correct section.