Layer Comps To Files - Export error: Could not complete this operation. There are no user slices

Question

I have been using the Export Layer Comps To Files scrips that ships with Adobe Photoshop CS5 for a while and found it very useful, apart from the numbers it automatically adds as a prefix to the layercomp name.
A friend pointed me in the direction of a altered version of this scrips which removes the numbers and only exports the layer comp name, gerat I thought. Not great! After using this successfully for a while the scrip started to throw up errors whenever I attempted to export. Either "No layer comps found" or "Adobe Save for Web & Devices Error: Could not complete this operation. There are no user slices." As I knew there were layercomps for the first error and knew that I had not created any slices for the second error I was pretty miffed. Fortunately I had the foresight to make a copy of the original script from the Photoshop presets library.
I have since deleted the offending script out of my presets folder and copied the original script back in however the error still persists. I constantly receive Adobe Save for Web & Devices Error: Could not complete this operation. There are no user slices. I have searched the forums and around the net to try and find a solution for this problem but none seem to present themselves. I am perplex how this error can persist when the original script is now being used.
If there's is anyone out there who can help me resolve this I'd be most grateful. As I say I've tried to resolve this myself and am pretty computer savvy but this one has defeated me
Thanks in advance

Answer 1

The problem seems to be already solved, but I'm commenting this for future reference.
This has happened to me too and I think I know what causes it.
It happens when you...
1) Do "Save for Web" with the "All User Slices" selected in the dropdown menu "Slices".
(This can only be done with a file that has a user slice)
2) Then try to use the "Layer Comp to Files" script to a file that doesn't have any slices.
To avoid this you need to once open a file that "has" a user slice and save with
the "All Slices" option in the "Slices" menu and then go back to the file you want
to run the script to.
When you run the script, the saved "Slices" option from the previous export seems to
be used and causes an error when there are no user slice.
I also found a fix to the script to avoid this error to come out.
This can be also applied to the fix to "remove the numbers" added to the head of the
exported file names.
The number removal script goes something like this...
var fileNameBody = exportInfo.fileNamePrefix;
if (fileNameBody != "") fileNameBody += "_";
fileNameBody += compRef.name;
this should replace the "Layer Comps to Files.jsx" lines 188-190.
In addition to that, the script below needs to be added below line 818 and line 863.
(This line numbers are those before any alterations to the "Layer Comps to Files.jsx" script)
var idSWsl = charIDToTypeID( "SWsl" );
var idSTsl = charIDToTypeID( "STsl" );
var idSLAl = charIDToTypeID( "SLAl" );
desc4.putEnumerated( idSWsl, idSTsl, idSLAl );
The line right above where the above script should be inserted should read as the following...
desc4.putPath( id44, new File( exportInfo.destination + "/" + fileNameBody + ".png") );
Actually it can be added any where after the "desc4" variable is declared but I specified just
to make it simple.
This sets the "Save for Web" "Slices" settings to "All User Slices".