diff --git a/tools/printDocument.ts b/tools/printDocument.ts
index 15cdc98..2339eed 100644
--- a/tools/printDocument.ts
+++ b/tools/printDocument.ts
@@ -15,6 +15,7 @@ async function readContent(path?: string): Promise<string> {
         const buf = await readAll(Deno.stdin);
         content = decoder.decode(buf);
     }
+    else throw new Error("No input provided. path or stdin.");
     return content;
 }
 
@@ -47,8 +48,8 @@ async function readAndPrint(args: {
 
 async function main() {
     const parsedArg = argParse(Deno.args);
-    const { path, outpath, overall, w } = parsedArg;
-
+    const { path, outpath, overall, w, watch } = parsedArg;
+    const watchMode = w || watch;
     if (typeof path !== "undefined" && typeof path !== "string") {
         console.log("Please provide a path to the json file.");
         Deno.exit(1);
@@ -61,11 +62,11 @@ async function main() {
         console.log("Please provide a boolean value for overall.");
         Deno.exit(1);
     }
-    if (typeof w !== "undefined" && typeof w !== "boolean") {
+    if (typeof watchMode !== "undefined" && typeof watchMode !== "boolean") {
         console.log("Please provide a boolean value for w.");
         Deno.exit(1);
     }
-    if (w && typeof path === "undefined") {
+    if (watchMode && typeof path === "undefined") {
         console.log("Could not set watch mode without a path.");
         Deno.exit(1);
     }
@@ -82,7 +83,7 @@ async function main() {
     const issues = JSON.parse(c) as Issue[];
     issues.sort((a, b) => a.number - b.number);
     await readAndPrint({ path, outpath, overall });
-    if (w) {
+    if (watchMode) {
         const watcher = Deno.watchFs([viewPath, path as string]);
         for await (const event of watcher) {
             if (event.kind === "modify") {