Hi. After updating from jAlbum 39.3.1 to jAlbum 39.7 i get the following error message regarding my slide.htt (which caused no problems before):

Stack trace for jAlbum 39.7 using skin Tiger 8.2.0:

se.datadosen.tags.ElementException: Relative indexing in ja:fileiterator not allowed in this scope (slide.htt:332)
at se.datadosen.jalbum.ast.IteratorNode.doEval(IteratorNode.java:80)
at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)
at se.datadosen.jalbum.ast.GroupNode.doEval(GroupNode.java:78)
at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)
at se.datadosen.jalbum.AST.eval(AST.java:68)
at se.datadosen.jalbum.AlbumBean.makeSlide(AlbumBean.java:4954)
at se.datadosen.jalbum.AlbumBean.lambda$makeAlbumForFolder$8(AlbumBean.java:2122)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

The code line in (slide.htt:332) is:

<ja:fileiterator exclude="folder,webLocation" start="-6" count="12" nodirs>

Any ideas?

Edited by: zif on 25 Jul 2026, 15:26

I suppose we'll need to see your slide.htt, and have you tell us what you're trying to do, and why.

But we don't normally delve into customizations - it quickly becomes The Black Hole of Support.

How is that different from the index page that Tiger produces? Remember, modern search engines execute the Javascript on a page, so even if things are being "lazy loaded," they're still discoverable.

Sorry, can't help you with that. Maybe someone else can.

Hi Rob. Thanks for your suggestion. Re-installing jAlbum didn't help. But now i noticed, that the problem seems to occur only with one specific album. I was able to generate two other albums which have a similar structure and use the same skin and slide.htt without problems.

jAlbum 39.7 system console running Groovy (Groovy Scripting Engine)
This section captures debug prints sent to System.out and System.err
The top section evaluates expressions.
+Press Strg+E to evaluate an expression. (Evaluates selected text if selection is active)+
You have access to the basic jAlbum implicit objects such as engine and window

Sample expressions:
+4*(3+2); // Basic calculations+
engine.getSkin(); // Use of implicit object
for (AlbumObject ao : selectedObjects) println ao; // Iterate over selected objects
window.messageBox("You can interact with any Java object");
Profiler.instance // Print profiling data for last album build

Startup: 4.54s
Skin loading: 1.12s
Skin loading: 0.498s
Skin loading: 0.281s

Erzeuge "Panorama" (Änderungen)
"Panorama" erzeugt in 2.167s
Skin loading: 0.317s

Erzeuge "Fernweh" (Änderungen)
"Fernweh" erzeugt in 1m 10.514s
Skin loading: 0.816s

Erzeuge "Fotos" (Änderungen)
se.datadosen.tags.ElementException: Relative indexing in ja:fileiterator not allowed in this scope (slide.htt:332)
+ at se.datadosen.jalbum.ast.IteratorNode.doEval(IteratorNode.java:80)+
+ at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)+
+ at se.datadosen.jalbum.ast.GroupNode.doEval(GroupNode.java:78)+
+ at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)+
+ at se.datadosen.jalbum.AST.eval(AST.java:68)+
+ at se.datadosen.jalbum.AlbumBean.makeSlide(AlbumBean.java:4954)+
+ at se.datadosen.jalbum.AlbumBean.lambda$makeAlbumForFolder$8(AlbumBean.java:2122)+
+ at java.base/java.util.concurrent.FutureTask.run(Unknown Source)+
+ at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)+
+ at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)+
+ at java.base/java.lang.Thread.run(Unknown Source)+
se.datadosen.tags.ElementException: Relative indexing in ja:fileiterator not allowed in this scope (slide.htt:332)
+ at se.datadosen.jalbum.ast.IteratorNode.doEval(IteratorNode.java:80)+
+ at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)+
+ at se.datadosen.jalbum.ast.GroupNode.doEval(GroupNode.java:78)+
+ at se.datadosen.jalbum.ast.ASTNode.eval(ASTNode.java:50)+
+ at se.datadosen.jalbum.AST.eval(AST.java:68)+
+ at se.datadosen.jalbum.AlbumBean.makeSlide(AlbumBean.java:4954)+
+ at se.datadosen.jalbum.AlbumBean.lambda$makeAlbumForFolder$8(AlbumBean.java:2122)+
+ at java.base/java.util.concurrent.FutureTask.run(Unknown Source)+
+ at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)+
+ at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)+
+ at java.base/java.lang.Thread.run(Unknown Source)+

For testing I did also restore the project with a version before the JAlbum and skin update. The error message when "Make album" still occurs.

It works for me using the Sample Project with make slide pages enabled.

The best way to fix the problem is to identify the cause. Since it is a single project you could try the following:

Duplicate the project that fails.

In the duplicate exclude the first half of all folders. If it works add half back again. If it still fails exclude half of the remaining folders.

Repeat until you identify the folder that causes the failure.

When you have a small set of included folders/files delete the excluded folders/files and make the resulting project available either here or to jAlbum (David).