guarantee tmp directory with NOMAD_CODE_ROOT set

core/src/main/scala/eu/nomad_lab/parsers/SimpleExternalParser.scala

@@ -167,8 +167,12 @@ class SimpleExternalParserGenerator(
     Files.createDirectories(lab.LocalEnv.defaultSettings.procTmpDir, lab.LocalEnv.directoryPermissionsAttributes)
     val tmpDir = if (wantsTmp)
       Files.createTempDirectory(lab.LocalEnv.defaultSettings.procTmpDir, "parserTmp", lab.LocalEnv.directoryPermissionsAttributes)
-    else
-      envDir.resolve("tmp")
+    else {
+      val t = envDir.resolve("tmp")
+      if (!Files.exists(t))
+        Files.createDirectory(t, lab.LocalEnv.directoryPermissionsAttributes)
+      t
+    }
     if (trace) logger.info(s"parser $name created tmpDir for optimized parser at $tmpDir")
     val allReplacements = extraCmdVars +
       ("envDir" -> envDir.toString()) +