There are several albums that only differ in image size. The crash occurred with the largest album. Perhaps it has something to do with the size of the images (8k).
_________________________________________________________

Stack trace for jAlbum 39.4 using skin Tiger 8.0.4:

se.datadosen.util.ScriptException: <eval>:186 TypeError: null has no such function "replace" in sections.inc at line number 5
at se.datadosen.util.ScriptException.of(ScriptException.java:59)
at se.datadosen.jalbum.ast.ScriptletNode.doEval(ScriptletNode.java:99)
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.IncludeNode.doEval(IncludeNode.java:89)
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.EnterNode.doEval(EnterNode.java:23)
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:75)
at se.datadosen.jalbum.AlbumBean.makeIndexPages(AlbumBean.java:4484)
at se.datadosen.jalbum.AlbumBean.makeAlbumForFolder(AlbumBean.java:2001)
at se.datadosen.jalbum.AlbumBean.makeAlbumForFolder(AlbumBean.java:2204)
at se.datadosen.jalbum.AlbumBean.makeAlbumForFolder(AlbumBean.java:2204)
at se.datadosen.jalbum.AlbumBean.makeAlbum(AlbumBean.java:3953)
at se.datadosen.jalbum.AlbumBean.smartMakeAlbum(AlbumBean.java:3789)
at se.datadosen.jalbum.JAlbumFrame$7.run(JAlbumFrame.java:1217)
Caused by: javax.script.ScriptException: TypeError: null has no such function "replace" in <eval> at line number 186
at org.openjdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:436)
at org.openjdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:420)
at org.openjdk.nashorn.api.scripting.NashornScriptEngine$1.eval(NashornScriptEngine.java:476)
at java.scripting/javax.script.CompiledScript.eval(Unknown Source)
at se.datadosen.jalbum.ast.ScriptletNode.doEval(ScriptletNode.java:67)
... 17 more
Caused by: <eval>:186 TypeError: null has no such function "replace"
at org.openjdk.nashorn.internal.runtime.ECMAErrors.error(ECMAErrors.java:57)
at org.openjdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:212)
at org.openjdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:184)
at org.openjdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:171)
at org.openjdk.nashorn.internal.runtime.linker.NashornBottomLinker.linkNull(NashornBottomLinker.java:258)
at org.openjdk.nashorn.internal.runtime.linker.NashornBottomLinker.getGuardedInvocation(NashornBottomLinker.java:69)
at jdk.dynalink/jdk.dynalink.linker.support.CompositeGuardingDynamicLinker.getGuardedInvocation(Unknown Source)
at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.lambda$getGuardedInvocation$0(Unknown Source)
at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.getWithLookupInternal(Unknown Source)
at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.getGuardedInvocation(Unknown Source)
at jdk.dynalink/jdk.dynalink.DynamicLinker.relink(Unknown Source)
at org.openjdk.nashorn.internal.scripts.Script$340$\^eval\_.:program(<eval>:186)
at org.openjdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:646)
at org.openjdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:506)
at org.openjdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:519)
at org.openjdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:415)
... 20 more

__________________________________________________________

I tried to let it run again and got this:

An unexpected error occurred. Please see detailed description below:

java.lang.OutOfMemoryError: Java heap space

Thank you very much!

It's not the picture processing that fails, but the overall Java memory management. An 8K image should work flawlessly.