diff --git a/common/src/args_parse.rs b/common/src/args_parse.rs
index fe62350..9f3ff01 100644
--- a/common/src/args_parse.rs
+++ b/common/src/args_parse.rs
@@ -7,33 +7,33 @@ pub fn ips_parse(ips: &Vec<String>) -> Result<Vec<(u32, u32, Ipv4Addr)>, String>
         let net = if let Some(net) = split.next() {
             net
         } else {
-            return Err("ipv4/mask,ipv4".to_string());
+            return Err(format!("ipv4/mask,ipv4 {:?}", x));
         };
         let ip = if let Some(ip) = split.next() {
             ip
         } else {
-            return Err("ipv4/mask,ipv4".to_string());
+            return Err(format!("ipv4/mask,ipv4 {:?}", x));
         };
         let ip = if let Ok(ip) = ip.parse::<Ipv4Addr>() {
             ip
         } else {
-            return Err("not ipv4".to_string());
+            return Err(format!("not ipv4 {:?}", ip));
         };
         let mut split = net.split("/");
         let dest = if let Some(dest) = split.next() {
             dest
         } else {
-            return Err("no ipv4/mask".to_string());
+            return Err(format!("no ipv4/mask {:?}", net));
         };
         let mask = if let Some(mask) = split.next() {
             mask
         } else {
-            return Err("no netmask".to_string());
+            return Err(format!("no netmask {:?}", net));
         };
         let dest = if let Ok(dest) = dest.parse::<Ipv4Addr>() {
             dest
         } else {
-            return Err("not ipv4".to_string());
+            return Err(format!("not ipv4 {:?}", dest));
         };
         let mask = to_ip(mask)?;
         in_ips_c.push((u32::from_be_bytes(dest.octets()), mask, ip));
@@ -48,17 +48,17 @@ pub fn out_ips_parse(ips: &Vec<String>) -> Result<Vec<(u32, u32)>, String> {
         let dest = if let Some(dest) = split.next() {
             dest
         } else {
-            return Err("no ipv4/mask".to_string());
+            return Err(format!("no ipv4/mask {:?}", x));
         };
         let mask = if let Some(mask) = split.next() {
             mask
         } else {
-            return Err("no netmask".to_string());
+            return Err(format!("no netmask {:?}", x));
         };
         let dest = if let Ok(dest) = dest.parse::<Ipv4Addr>() {
             dest
         } else {
-            return Err("not ipv4".to_string());
+            return Err(format!("not ipv4 {:?}", dest));
         };
         let mask = to_ip(mask)?;
         in_ips_c.push((u32::from_be_bytes(dest.octets()), mask));