Although there are plenty of reasons that can trigger this error, we have compiled most of them below:
Enabled Enhanced Security Mode- It turns out that if the enhanced security mode is enabled, you might encounter this error message. Therefore, you may need to disable Enhanced Security Mode before proceeding with the solutions.Outdated Adobe Acrobat PDF Reader- An outdated Adobe Acrobat PDF Reader can be one of the main reasons that can cause the error: ‘There was an error opening this document. The file is damaged and could not be repaired.’ According to affected users, the error can occur due to outdated software that does not support the specific PDF file.Corrupted Browser Files- If you encounter the error while accessing the PDF file via a browser, it might be due to corrupted temporary data. To avoid this, you may need to remove the temporary browsing data to open the PDF file.Corrupted PDF File-The file you are attempting to open may have been corrupted during the downloading process. To fix this, you need to re-download the PDF file.Unsupported PDF File-The error could also be caused by the unsupported styles used in the PDF file, as some styles are still not supported by the AutoCAD software.
1. Disable Enhanced Security Mode.
Enhanced Security Mode is a feature in Adobe Acrobat PDF Reader that provides a method to specify the location of trusted files because some locations are not allowed in Adobe Acrobat PDF Reader. By using this feature, you can either prevent dangerous actions or permit them at your own risk. The main reason for creating this feature is to restrict irrelevant document behaviors. This is why Enhanced Security Mode may prevent you from accessing a PDF file.
2. Repair Adobe Acrobat Reader.
Another reason for the emergence of this error is corrupted Adobe Acrobat Reader software. Some software gets corrupted due to malware attacks, which can damage essential files running in the background. The Adobe Acrobat Reader.exe file might be one of them. Follow the steps to repair Adobe Acrobat PDF Reader:
3. Make sure Adobe is up to date
If you use an outdated version of Adobe Acrobat Reader, you may encounter this error message because the PDF file might not be compatible with the outdated Adobe Acrobat Reader. Therefore, ensure that the software you are using is up-to-date. If it is not, follow the steps below to update it.
4. Ensure the PDF file is not located in the network share.
After detailed research, we found that if the file you are trying to open is located in the Network Share folder or Roaming Profiles, you will encounter this error message. This is because the content within these folders can be shared over a network, and these locations are not allowed by Adobe Acrobat Reader.
5. Remove the browser’s temporary files.
If the error arises while opening the PDF via a browser, we recommend clearing the browser’s temporary data, which stores your browsing history, cookies, passwords, and web information. Removing the browser’s temporary files may fix this error, as corrupted temporary files can conflict with the Adobe Acrobat PDF Reader software.
6. Re-download the PDF
There is a good possibility that the file you are trying to access in Adobe Acrobat Reader was corrupted during the downloading process. If there was any lag in your network, the PDF file might have been damaged and cannot be opened. You can either repair the file using third-party software or re-download the PDF file. We recommend opting for a re-download because it will not take much time. If the error persists after re-downloading the PDF file, it is probably due to the corrupted software file that has not been repaired.
7. Reinstall Adobe Acrobat Reader
If all the solutions fail to fix this, try reinstalling Adobe Acrobat Reader because the Adobe Acrobat PDF Reader files may be corrupted or damaged. This issue can be resolved by reinstalling the software. Below are the steps to reinstall the software:
8. Use different software to open PDF documents.
You must know that it is not necessary to use Adobe Acrobat Reader to open the PDF file. There is plenty of software available on the internet that might be able to open those files that Adobe Acrobat Reader cannot. You can use the freeware Foxit Reader to open PDF files.
