MSP8 - avp file reading error

[gigi10]

After applying several audio filters and saving the project, the .avp file becomes unreadable. The day after saving, can't open the .avp file.
Got message Video Editor "file reading error [20379:1:107]"
(can restart with an older automatically saved file ... ouf !)

What is the problem ? audio filters applied too many times ?
('Amplify' with value from 1 to 130 on about 30 clips)
Has anyone got the same problem ?