Analyzing MSBuild Failures with Binary Logs

Use MSBuild's built-in binlog replay to convert binary logs into searchable text logs, then analyze with standard tools (grep, cat, head, tail, find).

Build Error Investigation (Primary Workflow)

Step 1: Replay the binlog to text logs

Replay produces multiple focused log files in one pass:

dotnet msbuild build.binlog -noconlog \
  -fl  -flp:v=diag;logfile=full.log;performancesummary \
  -fl1 -flp1:errorsonly;logfile=errors.log \
  -fl2 -flp2:warningsonly;logfile=warnings.log

PowerShell note: Use -flp:"v=diag;logfile=full.log;performancesummary" (quoted semicolons).