diff --git a/src/nex.rs b/src/nex.rs
index d9589a7..263f51f 100644
--- a/src/nex.rs
+++ b/src/nex.rs
@@ -22,10 +22,14 @@ impl Nex {
         pattern: String,
         user_names: &Vec<String>,
     ) -> Result<Self> {
+        use std::path::MAIN_SEPARATOR;
+        if filename.contains(MAIN_SEPARATOR) {
+            bail!("Filename pattern should not contain `{MAIN_SEPARATOR}` characters!")
+        }
         // init data export location
         let target = PathBuf::from_str(&target_dir)?.canonicalize()?;
         if !target.is_dir() {
-            bail!("Target location is not directory!");
+            bail!("Target location is not directory!")
         }
         // init locations for each user
         let mut users = HashMap::with_capacity(user_names.len());
@@ -156,11 +160,7 @@ impl Nex {
             );
 
         // save post file
-        p.push(
-            published
-                .format(self.filename.trim_matches(std::path::MAIN_SEPARATOR))
-                .to_string(),
-        );
+        p.push(published.format(&self.filename).to_string());
         let f = p.to_string_lossy();
         if fs::exists(&p)? {
             println!("\t\t\tpost file `{f}` update with new content.")