Not a log profiler data file (or unsupported version).

Mono log profiler report version 0.4 Usage: mprof-report [OPTIONS] FILENAME FILENAME can be '-' to read from standard input. Options: --help display this help --out=FILE write to FILE instead of stdout --traces collect and show backtraces --maxframes=NUM limit backtraces to NUM entries --reports=R1[,R2...] print the specified reports. Defaults are: header,jit,gc,sample,alloc,call,metadata,exception,monitor,thread,heapshot,counters,coverage --method-sort=MODE sort methods according to MODE: total, self, calls --alloc-sort=MODE sort allocations according to MODE: bytes, count --counters-sort=MODE sort counters according to MODE: time, category only accessible in verbose mode --track=OB1[,OB2...] track what happens to objects OBJ1, O2 etc. --find=FINDSPEC find and track objects matching FINFSPEC, where FINDSPEC is: S:minimum_size or T:partial_name --thread=THREADID consider just the data for thread THREADID --time=FROM-TO consider data FROM seconds from startup up to TO seconds --verbose increase verbosity level --debug display decoding debug info for mprof-report devs --coverage-out=FILE write the coverage info to FILE as XML