Strange, it doesn’t block avastsvc.exe on my win7 netbook with MBAM Pro and avast 6.0.1125 free and I have no exclusions for avast in MBAM other than excluding the c:\windows\temp_avast_ folder where files are unpacked for scanning.

What do you mean by blocking ?
Can you post the log or blocking details or post an image of any details.

@ SafeSurf
It is MBAM Pro doing the blocking of avast and not the other way around. So adding mbam exclusions in avast won’t change that.

I also haven’t excluded any MBAM location or file in avast either and I haven’t had any issue.