Hi Chris, Thanks for your email. I had previously commented out the itialization and now the whole thing (as you suggested). It still SIGSEGV's out on me. I had been assuming, when I commented out only the initialization, that the default initialization to NULL's was the problem (no other initializer available). Now you got me wondering... The backtrace shows that it's in WINE (I think) in wine_nt_to_unix_file_name, which was suspiciously like the VstFileType struct --- at first glance, anyway. Thanks again and best regards, Dave.