On the issue of missing Requirement Bundle

[dongchen1221]

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:2.7.5:validate-classpath (default-validate-classpath) on project com.nucleisys.ide: Execution default-validate-classpath of goal org.eclipse.tycho:tycho-compiler-plugin:2.7.5:validate-classpath failed: org.osgi.framework.BundleException: Bundle com.nucleisys.ide cannot be resolved:com.nucleisys.ide [42]
[ERROR] Unresolved requirement: Require-Bundle: org.eclipse.ui
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:2.7.5:validate-classpath (default-validate-classpath) on project com.nucleisys.ide: Execution default-validate-classpath of goal org.eclipse.tycho:tycho-compiler-plugin:2.7.5:validate-classpath failed: org.osgi.framework.BundleException: Bundle com.nucleisys.ide cannot be resolved:com.nucleisys.ide [42]
Unresolved requirement: Require-Bundle: org.eclipse.ui

<repositories>	
	<repository>
	  <id>license-feature</id>
	  <url>https://download.eclipse.org/tools/cdt/releases/9.10</url>
	  <layout>p2</layout>
	</repository>
	<repository>
	  <id>license-feature1</id>
	  <url>https://download.eclipse.org/embed-cdt/releases/5.1.1/p2/</url>
	  <layout>p2</layout>
	</repository>
</repositories>	

Why is this situation happening? If it's a problem with the target platform, but you can find org.eclipse.ui in my target platform status view？

[laeubi]

but you can find org.eclipse.ui in my target platform status view

Your configuration does not use a target file at all.

So you probably want two things:

1. Use a more recent Tycho version (3.x is the current most recent one)
2. configure Tycho with your target platform