Logic Pro 7: Don‘t use special characters for filenames during OMF export

When exporting an OMF file from Logic Pro, an alert says:

"An OMF error has occurred. Error code 18. Description: OMFI_ERR: Cannot open File"

The export is then cancelled.

This happens when the file name contains an umlaut or another special character. The OMF library does not support these characters. Check your filename for special characters and use a different filename for the OMF file.