Failed to save target content: Missing bookmark end tag with name

When I try to generate traget document I receive the following error:

"Failed to save target content: Missing bookmark end tag with name: bookmark265. Writing to Word document not possible

Sdl.FileTypeSupport.Framework.FileTypeSupportException, Sdl.FileTypeSupport.Framework.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c28cdb26c445c888"

methods used to solve the problem:

  • Instruction in KB #460
  • uploading the source again after cleaning it from all tags with diffrent formats (rtf, doc, txt)
  • copying source to target (CTRL+insert) saving and generating the target.

When I press on the error message I'm taken to file tag before the first segment

tried exporting to an external viewer and reed the following  error:

", ערך הקסדצימאלי 0x1C, הוא תו לא חוקי.

System.ArgumentException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

"