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Nuclos IDE errors: ajc, org.nuclos.schema, mvn clean, spring-instrument, AspectJ, NullPointerException, Autowired, VM arguments. |
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Problems and error messages with the IDE
Troubleshooting for Nuclos development – fix compiler, server, client and runtime errors.
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| colour | Green |
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| title | Updated: Jul 2026 |
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| colour | Grey |
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| title | applies to Nuclos 4.2026.x |
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Common errors during Nuclos development in the IDE and how to fix them.
When compiling
| Error | Fix |
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ajc: The import org.nuclos.schema.* cannot be resolved | nuclos-schema → Maven → Generate Sources and Update Folders. |
ajc: * cannot be resolved to a type | nuclos → Maven → Reimport. |
When starting the server
BeanCreationException … A universal match pattern ('/**') is defined before other patterns …: run mvn clean in the terminal.
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For mvn clean to take effect, the war must be listed as a module in the pom.xml. This is given for the Nuclos core; for extension projects you may need to add it. |
When starting the client
Error creating bean 'internalAspectJWeavingEnabler' … (form freezes after login): place the spring-instrument-*.jar somewhere and reference it in the client configuration under VM arguments.
Runtime
Unexpected NullPointerException (e.g. on @Autowired fields): Nuclos needs the AspectJ compiler. Make sure Ajc is active in the Maven import.
Related pages
Tutorial: integrating Nuclos into IntelliJ IDEA
IntelliJ.
Open →
