diff --git a/lib/mmlp/parse.go b/lib/mmlp/parse.go
index 83d84c33..c914d5f8 100644
--- a/lib/mmlp/parse.go
+++ b/lib/mmlp/parse.go
@@ -438,7 +438,7 @@ func RunShellCommand(mml *MmlCommand, omcMmlVar *MmlVar, outputJson *dborm.MmlOu
 		}
 	}
 	cmd := exec.Command("sh", "-c", command)
-	out, err := cmd.CombinedOutput()
+	out, err := cmd.Output()
 	log.Tracef("Exec output: %v", string(out))
 	if err != nil {
 		log.Error("exe cmd error: ", err)