Invalid Schema/DTD file

[SF_11078401]

I tried to open an xml file that was created with dtd 40051C_6_3. I am using Arbortext Editor 8.2. When I select I DTD, I get a message that says Arbortext Editor is unable to load the document type due to errors parsing the DTD. I am fairly new to setting up Arbortext Editor and am completely lost. Can anyone help?

[VladimirN · Accepted solution]

Same issue:

• "[A15000] Unable to load document type due to errors parsing DTD using Arbortext Publishing Engine (PE)": https://www.ptc.com/en/support/article/CS215026 
• "E3 error - Unable to load document type due to errors parsing DTD": https://community.ptc.com/t5/Arbortext/E3-error-Unable-to-load-document-type-due-to-errors-parsing-DTD/td-p/147003