ERROR message: An error occurred while creating Threads

Since this problem is specific to just one document here are some troubleshooting tips taken from [url=http://kb.adobe.com/selfservice/viewContent.do?externalId=317147&sliceId=2]Troubleshoot problems with Acrobat PDFMaker (6.0-7.0, Acrobat 3D on Windows) technical note[/url]:Enable only the Acrobat PDFMaker features the document uses. For example, if the document contains only the heading styles Heading 1 and Heading 2, disable the other heading styles in the Acrobat PDFMaker dialog box.

Switch to the Normal document view in Word, and then create the PDF file using Acrobat PDFMaker.

Re-create the Word document to eliminate any damage in it by doing one or more of the following:

-- Copy and paste the content of the Word document into a new document, and then create the PDF file.

-- Select all of the text in the document, change its font, and then save the document with a new name. Word rewrites the document, which may eliminate whatever element is conflicting with Acrobat PDFMaker. After you save the document, you can reformat it in the desired font.

-- If the document was created in a version of Word other than the version you use to create the PDF file, make a small change to the document, and then save it with a new name. This procedure forces Word to rewrite the document, possibly eliminating any elements that conflict with Acrobat PDFMaker.

Re-create any custom heading styles in the document, and then create the PDF file.

Identify conflicting elements in the document:

1. Create a new Word document.

2. Copy half of the original Word document into the new Word document.

3. Convert the new Word document to PDF using Acrobat PDFMaker:

-- If the problem recurs, a conflicting element exists in the new Word document. To further isolate the conflicting element, repeat steps 1-3, and copy half of the second Word document into another new Word document.

-- If the problem does not occur, a conflicting element exists in the original Word document. To further isolate the problem, repeat steps 1-3, and copy the other half of the original Word document into another new Word document. If both halves of the document convert correctly, close other programs that are running, including the Office application, and delete .tmp files (usually located in the Windows/Temp folder).

I am having a similar issue, but now it's not with just one document. The user has Word 2003 and Acrobat 6 and it has worked perfectly up until now. I tried all the recommendations listed above. I created a totally new Word document, and it gives the same error when converting to PDF. I converted a couple of older documents, and one converted fine while the other gave this error. Any and all help much appreciated.

Have you tried deleting the .tmp files (usually located in the Windows/Temp folder)?