There have been a long thread already about Musta's team art first version that were causing troubles with my tools due to an incomplete update of GP4 files.
I can't remind the name of the thread but it should be easy to find it with the search feature as usual.
AT the end of this thread, Musta told he will release a new version that should work fine but I don't know more.
COncerning errors:
"Lecture au dela de la fin de fichier" means that the file is shortest (in bytes) thatn expected by the app. This could happen if you installed Musta's teamart without GPibrowser (using csc for example) because in that case the .gph file is not updated properly and GPiBrowser can't match size of the picture with the one in the .gph file.
"Erreur E/S 32" means that the file is already used by another application. You should look what apps are working in the background to know which is in cause.
"Erreur E/S 103" means that file has not been opened before accessing it.
It usually could happen during coding process but it's very quickly noticed and fixed so it should not happen for the user but in very extreme cases (something as weird as opening a file in TeamEditor, then delete original file and try to save changes from 3DEditor in this file again...something like that).