Any suggestion with the parameter issue?
Click 'Settings' in my signature and browse for the 'default' settings. I'll let them this way into avast4.ini file.
[Scanner]
MaxFileSizeToExtract_Scanner=500000
MaxFileSizeToExtract_Resident=100000
MaxFileSizeToExtract_Mail=30000
MaxCompressionRatio_Scanner=90
MaxCompressionRatio_Resident=90
MaxCompressionRatio_Mail=90
CompressionCheckThreshold_Scanner=10000
CompressionCheckThreshold_Resident=10000
CompressionCheckThreshold_Mail=10000
If these vales aren't in your avast4.ini file they will be assumed by default