DVD MF 3SE another 5003 prob

[aigre16]

I axquired this prog with DVDExpress

Alk was well till recently.Now It gives up with error 5003 Prob with source file,when either just before disk burn or make disk image, but is ok if you make Video_Ts files, that burn ok with another burn prog.

Reinstalling, restoring from backups,make no difference.

It seems to me it cannot find the files it creates.

Anyone know where they are stored,or which file has info which points to them.

Or any other solution

Thanks in atnicipation