diff --git a/lib/user-manager.sh b/lib/user-manager.sh
index 7770566..45b11b4 100755
--- a/lib/user-manager.sh
+++ b/lib/user-manager.sh
@@ -230,6 +230,7 @@ get_system_user_info() {
 #############################################################################
 
 get_user_domains() {
+    [ -z "$1" ] && return 1
     local username="$1"
 
     case "$SYS_CONTROL_PANEL" in
@@ -249,6 +250,7 @@ get_user_domains() {
 }
 
 get_cpanel_user_domains() {
+    [ -z "$1" ] && return 1
     local username="$1"
 
     # Primary domain (format: domain: user)
diff --git a/modules/backup/acronis-troubleshoot.sh b/modules/backup/acronis-troubleshoot.sh
index 2efc12a..339a2ad 100755
--- a/modules/backup/acronis-troubleshoot.sh
+++ b/modules/backup/acronis-troubleshoot.sh
@@ -56,16 +56,19 @@ declare -a RECOMMENDATIONS=()
 
 # Function to add issue
 add_issue() {
+    [ -z "$1" ] && return 1
     ISSUES_FOUND+=("$1")
 }
 
 # Function to add warning
 add_warning() {
+    [ -z "$1" ] && return 1
     WARNINGS_FOUND+=("$1")
 }
 
 # Function to add recommendation
 add_recommendation() {
+    [ -z "$1" ] && return 1
     RECOMMENDATIONS+=("$1")
 }
 
diff --git a/tools/toolkit-qa-check.sh b/tools/toolkit-qa-check.sh
index d1d3202..9b4651f 100755
--- a/tools/toolkit-qa-check.sh
+++ b/tools/toolkit-qa-check.sh
@@ -472,8 +472,15 @@ while read -r file; do
         func_name=$(echo "$func_line" | sed 's/^\s*//; s/(.*$//')
 
         # Check if function uses parameters (exclude AWK/sed field references)
-        # Get function body and filter out awk/sed commands before checking for $1-9
-        func_body=$(grep -A 20 "^[[:space:]]*$func_name()" "$file" 2>/dev/null | grep -v 'awk\|sed' || true)
+        # Get function body - need to handle multi-line AWK/sed blocks
+        func_body=$(grep -A 20 "^[[:space:]]*$func_name()" "$file" 2>/dev/null)
+
+        # Remove AWK blocks completely (from awk ' to closing ')
+        # This handles multi-line AWK scripts where $1 is AWK field reference
+        func_body_clean=$(echo "$func_body" | sed '/awk.*'"'"'/,/'"'"'/d' | grep -v 'sed ')
+
+        # Use cleaned body for detection
+        func_body="$func_body_clean"
 
         # Skip functions that only use $@ or $* (passthrough/wrapper functions)
         if echo "$func_body" | grep -E '^\s*(echo|printf).*\$[@*]' | grep -qv '\$[1-9]'; then