Illegal access to Java package: access denied

Script is attempting to access Java classes not included in ServiceNow's allowlist of permitted Java packages for security reasons. (high likelihood)

Code migrated from older ServiceNow versions that previously allowed broader Java access before security restrictions were tightened. (high likelihood)

Developer is trying to use standard Java libraries like java.io, java.net, or java.util classes that are blocked in scoped applications. (medium likelihood)

Script contains typos in Java class names that resolve to restricted packages instead of intended ServiceNow APIs. (medium likelihood)

Third-party code or examples copied from external sources that assume unrestricted Java access in ServiceNow environment. (low likelihood)

Step 1: Navigate to System Diagnostics > Log > Application Log and locate the specific error entry to identify which Java class or package is being accessed.

Step 2: Review the script causing the error and identify all Java class imports or instantiations, looking for patterns like 'new java.', 'Packages.java.', or 'java.lang.'.

Step 3: Check ServiceNow documentation for approved Java classes by searching 'Java API' in the product documentation or reviewing the Script Debugger allowed classes.

Step 4: Replace restricted Java classes with ServiceNow-native APIs such as GlideSystem, GlideRecord, GlideDateTime, or other Glide classes that provide similar functionality.

Step 5: For date/time operations, use GlideDateTime instead of java.util.Date; for string operations, use standard JavaScript instead of Java String methods.

Step 6: If Java functionality is absolutely required, consider implementing the logic in a MID Server script or external integration that can communicate back to ServiceNow via REST APIs.

Step 7: Test the modified script in a development instance and verify the error no longer appears in the System Log.

Step 8: Document the changes made for future reference and update any related code that might have similar Java access patterns.