diff --git a/data/libraries/hlm b/data/libraries/hlm
index 51e40dd8..ee02dc47 160000
--- a/data/libraries/hlm
+++ b/data/libraries/hlm
@@ -1 +1 @@
-Subproject commit 51e40dd85b12c3a1b10926a5568249c8a6fcc579
+Subproject commit ee02dc47faaddc60ffb504439bda6be200e3cec0
diff --git a/src/scripts/check.ts b/src/scripts/check.ts
index 4dc71dcf..1521727f 100644
--- a/src/scripts/check.ts
+++ b/src/scripts/check.ts
@@ -110,18 +110,20 @@ function checkItem(libraryDefinition: LibraryDefinition, libraryDataProvider: Li
   });
 }
 
-if (process.argv.length !== 3) {
+if (process.argv.length === 3) {
+  const libraryFileName = process.argv[2];
+  checkLibrary(libraryFileName)
+    .then(() => {
+      console.error(`Found ${errorCount} error(s) and ${warningCount} warning(s).`);
+      if (unexpectedError) {
+        process.exitCode = 1;
+      }
+    })
+    .catch((error) => {
+      console.error(error);
+      process.exitCode = 1;
+    });
+} else {
   console.error('usage: src/scripts/check.sh <libraryFile>');
-  process.exit(2);
+  process.exitCode = 2;
 }
-
-const libraryFileName = process.argv[2];
-checkLibrary(libraryFileName)
-  .then(() => {
-    console.error(`Found ${errorCount} error(s) and ${warningCount} warning(s).`);
-    process.exit(unexpectedError ? 1 : 0);
-  })
-  .catch((error) => {
-    console.error(error);
-    process.exit(1);
-  });
diff --git a/src/scripts/checkLinks.ts b/src/scripts/checkLinks.ts
index e7c2f2d6..c6118f0f 100644
--- a/src/scripts/checkLinks.ts
+++ b/src/scripts/checkLinks.ts
@@ -11,6 +11,15 @@ const linkCheck = require('link-check');
 let linksFound = 0;
 let linksChecking = 0;
 let linksChecked = 0;
+let errors = 0;
+
+function finished(): void {
+  console.log(`${linksChecked} links checked.`);
+  if (errors) {
+    console.log(`${errors} error(s) found.`);
+    process.exitCode = 1;
+  }
+}
 
 class LinkExtractor {
   constructor(private fileName: string) {}
@@ -35,13 +44,15 @@ class LinkExtractor {
       linkCheck(uri, (err: any, result: any) => {
         if (err) {
           console.error(`${this.fileName}: ${err}`);
+          errors++;
         } else if (result.status !== 'alive') {
           console.error(`${this.fileName}: ${result.status} link: ${result.link}`);
+          errors++;
         }
         linksChecking--;
         linksChecked++;
         if (linksChecked === linksFound) {
-          console.log(`${linksChecked} links checked.`);
+          finished();
         }
       });
     } else {
@@ -80,13 +91,12 @@ function checkLinks(fileName: string): void {
   }
 }
 
-if (process.argv.length < 3) {
+if (process.argv.length >= 3) {
+  for (const fileName of process.argv.slice(2)) {
+    checkLinks(fileName);
+  }
+  console.log(`${linksFound} links found.`);
+} else {
   console.error('usage: src/scripts/checkLinks.sh <file1> [<file2>...]');
-  process.exit(2);
+  process.exitCode = 2;
 }
-
-for (const fileName of process.argv.slice(2)) {
-  checkLinks(fileName);
-}
-
-console.log(`${linksFound} links found.`);
diff --git a/src/scripts/generateMetaDeclarations.ts b/src/scripts/generateMetaDeclarations.ts
index 07ac6c1a..8757e0c5 100644
--- a/src/scripts/generateMetaDeclarations.ts
+++ b/src/scripts/generateMetaDeclarations.ts
@@ -1417,16 +1417,16 @@ function generate(inFileName: string, outFileName: string, referencedMetaModels:
   fs.writeFileSync(outFileName, outFileStr, 'utf8');
 }
 
-if (process.argv.length < 4) {
+if (process.argv.length >= 4) {
+  const refs: ReferencedMetaModel[] = [];
+  for (let argIndex = 4; argIndex + 1 < process.argv.length; argIndex++) {
+    refs.push({
+      inFileName: process.argv[argIndex],
+      outFileName: process.argv[argIndex + 1]
+    });
+  }
+  generate(process.argv[2], process.argv[3], refs);
+} else {
   console.error('usage: src/scripts/generateMetaDeclarations.sh <infile> <outfile> [<refinfile> <refoutfile> [...]]');
-  process.exit(2);
-}
-
-const refs: ReferencedMetaModel[] = [];
-for (let argIndex = 4; argIndex + 1 < process.argv.length; argIndex++) {
-  refs.push({
-    inFileName: process.argv[argIndex],
-    outFileName: process.argv[argIndex + 1]
-  });
+  process.exitCode = 2;
 }
-generate(process.argv[2], process.argv[3], refs);
diff --git a/src/scripts/tidy.ts b/src/scripts/tidy.ts
index 52c3ba32..d4937684 100644
--- a/src/scripts/tidy.ts
+++ b/src/scripts/tidy.ts
@@ -24,11 +24,11 @@ function tidy(fileName: string): void {
   }
 }
 
-if (process.argv.length < 3) {
+if (process.argv.length >= 3) {
+  for (const fileName of process.argv.slice(2)) {
+    tidy(fileName);
+  }
+} else {
   console.error('usage: src/scripts/tidy.sh <file1> [<file2>...]');
-  process.exit(2);
-}
-
-for (const fileName of process.argv.slice(2)) {
-  tidy(fileName);
+  process.exitCode = 2;
 }
diff --git a/src/server/generic/static/buildPreload.ts b/src/server/generic/static/buildPreload.ts
index 637a749b..dd47b116 100644
--- a/src/server/generic/static/buildPreload.ts
+++ b/src/server/generic/static/buildPreload.ts
@@ -28,13 +28,13 @@ function outputPreload(libraryFileName: string, outputDirName: string): CachedPr
   return preloadWriter.preloadLibrary(path.basename(libraryFileName, fileExtension));
 }
 
-if (process.argv.length !== 4) {
+if (process.argv.length === 4) {
+  outputPreload(process.argv[2], process.argv[3])
+    .catch((error) => {
+      console.error(error);
+      process.exitCode = 1;
+    });
+} else {
   console.error('usage: node buildPreload.js <libraryFile> <outputDir>');
-  process.exit(2);
+  process.exitCode = 2;
 }
-
-outputPreload(process.argv[2], process.argv[3])
-  .catch((error) => {
-    console.error(error);
-    process.exit(1);
-  });
diff --git a/src/server/generic/static/buildStatic.ts b/src/server/generic/static/buildStatic.ts
index 7de02765..268a4cf0 100644
--- a/src/server/generic/static/buildStatic.ts
+++ b/src/server/generic/static/buildStatic.ts
@@ -250,13 +250,13 @@ function buildStaticPages(libraryFileName: string, logicName: string, htmlTempla
     .then(() => libraryDataProvider.close());
 }
 
-if (process.argv.length !== 9) {
+if (process.argv.length === 9) {
+  buildStaticPages(process.argv[2], process.argv[3], process.argv[4], process.argv[5], process.argv[6], process.argv[7], process.argv[8])
+    .catch((error) => {
+      console.error(error);
+      process.exitCode = 1;
+    });
+} else {
   console.error('usage: node buildStatic.js <libraryFile> <logic> <htmlTemplateFile> <notationTemplateFile> <libraryURL> <gitHubURL> <outputDir>');
-  process.exit(2);
+  process.exitCode = 2;
 }
-
-buildStaticPages(process.argv[2], process.argv[3], process.argv[4], process.argv[5], process.argv[6], process.argv[7], process.argv[8])
-  .catch((error) => {
-    console.error(error);
-    process.exit(1);
-  });