cxhttt233 opened a new issue, #8477:
URL: https://github.com/apache/hop/issues/8477
### Apache Hop version?
2.20.0-SNAPSHOT-20260919
### Java version?
Java 21
### Operating system
Docker / Linux ARM64
### What happened?
Enabling a project in Hop Web can fail while saving/restoring GUI state.
The first error occurs when the execution perspective has not been
initialized:
```text
HopException:
Error enabling project 'hfgc' in HopGui
Cannot invoke
"org.apache.hop.ui.hopgui.perspective.execution.ExecutionPerspective.saveState()"
because the return value of
"ExecutionPerspective.getInstance()" is null
```
`ProjectsGuiPlugin` currently calls:
```java
ExecutionPerspective.getInstance().saveState();
```
without checking whether the perspective exists.
A second failure can occur while restoring the Explorer layout:
```text
java.lang.IllegalArgumentException: Argument cannot be null
at org.eclipse.swt.widgets.MenuItem.<init>
at
org.apache.hop.ui.hopgui.perspective.explorer.ExplorerPerspective.createSingleTabFolder
at
org.apache.hop.ui.hopgui.perspective.explorer.ExplorerPerspective.resetEditorToSinglePane
at
org.apache.hop.ui.hopgui.perspective.explorer.ExplorerPerspective.applyRestoredEditorSplitState
at
org.apache.hop.ui.hopgui.perspective.explorer.ExplorerPerspective.applyRestoredState
```
`createSingleTabFolder()` uses:
```java
Menu menu = folder.getMenu();
new MenuItem(menu, SWT.SEPARATOR);
```
In Hop Web, `folder.getMenu()` can still be `null` during state restoration.
This appears to be a RAP initialization-order issue: project activation can
trigger perspective/layout state handling before all related UI objects exist.
### Issue Priority
Priority: 2
### Issue Component
Component: Hop Web
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