Newest OXCE requires SAMPLE.CAT and SAMPLE2.CAT. Unfortunately, at least some European DOS versions do not contain these sound files. Since you are likely czech (judging from the paths in the log), you are probably using one of them.
In previous versions of this modpack, which were in a version of OXCE+, said files were not needed.
Edit: I misread your last post. So it is only the OXCE the latest modpack version came with?