diff --git a/extract.ps1 b/extract.ps1
index 1495057..6d4824e 100644
--- a/extract.ps1
+++ b/extract.ps1
@@ -6,14 +6,8 @@ $Config=Join-Path `
     -Path $Configs `
     -ChildPath (-Join ($CodeName,".txt"))
 If( -Not (Test-Path -Path $Config)){
-    Write-Output "warning: your model has no definition file, use default"
-    $Config=Join-Path `
-        -Path $Configs `
-        -ChildPath (-Join ($DefConfig,".txt"))
-    if( -Not (Test-Path -Path $Config)){
-        Write-Output "default definition file not found"
-        exit 1
-    }
+    Write-Output "ERROR: your model has no definition file, please check"
+    exit 1
 }
 If(Test-Path -Path output){
     Remove-Item `
diff --git a/extract.sh b/extract.sh
index d1fe03e..14c2524 100755
--- a/extract.sh
+++ b/extract.sh
@@ -8,17 +8,11 @@ then
 fi
 cd "$(dirname "$0")"
 CONFIGS=definitions
-DEF=sdm845-generic
 CONFIG="${CONFIGS}/${1}.txt"
 if ! [ -f "${CONFIG}" ]
 then
-	echo "warning: your model has no definition file, use default" >&2
-	CONFIG="${CONFIGS}/${DEF}.txt"
-	if ! [ -f "${CONFIG}" ]
-	then
-		echo "default definition file not found"
-		exit 1
-	fi
+	echo "ERROR: your model has no definition file, please check!" >&2
+	exit 1
 fi
 rm -rf ./output
 echo "copying drivers..."
diff --git a/extract_mac.sh b/extract_mac.sh
index 548f155..5c8ce7f 100644
--- a/extract_mac.sh
+++ b/extract_mac.sh
@@ -8,18 +8,13 @@ then
 fi
 cd "$(dirname "$0")"
 CONFIGS=definitions
-DEF=sdm845-generic
 CONFIG="${CONFIGS}/${1}.txt"
 if ! [ -f "${CONFIG}" ]
 then
-	echo "warning: your model has no definition file, use default" >&2
-	CONFIG="${CONFIGS}/${DEF}.txt"
-	if ! [ -f "${CONFIG}" ]
-	then
-		echo "default definition file not found"
-		exit 1
-	fi
+	echo "ERROR: your model has no definition file, please check!" >&2
+	exit 1
 fi
+rm -rf ./output
 echo "copying drivers..."
 while read -r line
 do