Ok I'll try to be as detailed as I can. I am using the rstoolkit-2.8.3.1-9605d7f3-win download with the hotfix applied. Audacity 2.3.1, Go Playalong 3.42, Guitar Pro 6 with a gp3 tab, (seems accurate enough without playing it.) paint.net for the cover-art @512x512 rez dds. I I tried the latest and reverted to the Wwise_v2015.1.9 5624 desperate for a fix, no change of course. Starting out I ran Audacity and the tab, added silence to beginning, cleaned the ending up and exported as WAV (Microsoft 16 mit PCM) I also exported it as guitar.ogg for eof. I clipped a nice 30 second clip for the preview and exported that accordingly, same name, _preview appended. Playalong was brought up next and the tab properly synced. This time I skipped the lyrics, it made no difference to the error and I can't sing anyways so onward I went. Ran EOF, The initial config below.http://i1377.photobucket.com/albums/ah49/Cataclysmmm/Screenshot_1_zpsefnwcxtr.png loaded the guitar.ogg to a new file. Song/Part Real Bass...and imported the gp3. set the intro, chorus and clicked the also add as RS Phase. (unchecking this did not end errors.) The album art and preview ogg was added, (ogg or wav no difference) here's a pic of the data all ready to build :http://i1377.photobucket.com/albums/ah49/Cataclysmmm/Screenshot_2_zpsjjqupij6.png So it runs the wise and no errors till after I set the filename at the end, then the instant crash as soon as it attempts to write the file. With the MAC and others checked it builds them then crashes on the PC part. Any help would be amazing. TIA.. OH, here's a rar with the files, maybe something is making empty file or something, I have no clue.