How to Fix Acrobat Pro DC Scan and OCR Low Memory or Disk Space Error
Question details
The user needs to resolve an error preventing them from scanning and performing OCR on PDFs due to reported insufficient memory or disk space.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- not provided
- Scenario
- Scanning a document and applying Optical Character Recognition (OCR) to convert scanned images into searchable and editable text.
- Observed behavior
- Adobe Acrobat Pro DC interrupts the process and displays a low memory or disk space error, stopping the OCR function from completing.
Ensure you have saved all open documents and verify your primary hard drive's available storage space before proceeding with the troubleshooting steps.
Free Up System Memory and Storage Space
The most common cause of OCR failure is insufficient RAM or storage on your primary drive. Clearing resources resolves the bottleneck.
Optical Character Recognition is a highly resource-intensive process. If your computer's RAM is maxed out by other applications, or if your hard drive lacks the space to create temporary OCR files, Acrobat will fail to process the document.
Open 'This PC' or 'My Computer' to ensure your primary system drive (usually C:) has at least a few gigabytes of free space.
Open your system's Task Manager and close any resource-heavy applications (like web browsers with many tabs or video editors) running in the background.
Press Windows Key + R, type '%temp%' into the Run dialog, and press Enter. Delete the contents of this folder to free up processing space for Acrobat.
Reboot your machine to clear the RAM cache, then open Adobe Acrobat Pro DC and attempt the OCR process again.
Process the PDF in Smaller Sections
Unusually large or high-resolution scanned documents can overwhelm Acrobat's OCR engine.
Repair or Update Adobe Acrobat Installation
Corrupted application files or outdated software versions can trigger false memory errors.
Use WPS Office as a Lightweight PDF Alternative
If Adobe Acrobat Pro DC continues to struggle with memory errors during OCR, try WPS Office. It includes a powerful, built-in PDF toolkit with efficient OCR capabilities that runs lightly on your system, allowing you to edit, convert, and recognize text without draining your computer's memory or storage.
Frequently Asked Questions
Why does Acrobat say disk space is full when I have plenty of space?
This can happen if the specific temporary folder Acrobat uses is full, if the application lacks the necessary read/write permissions for that folder, or if there is a software glitch misreading your system storage. Clearing the Temp folder and running the application as an administrator often resolves this.
Does OCR use a lot of computer memory?
Yes, Optical Character Recognition is a highly resource-intensive process. It requires the software to analyze high-resolution images pixel by pixel to recognize shapes as text, which demands significant RAM and processing power, especially for lengthy documents.
How can I reduce the file size of my PDF before running OCR?
You can use a PDF compressor tool to optimize the file size, or if you are scanning a physical document, try scanning it at a slightly lower resolution (e.g., 300 DPI instead of 600 DPI). This produces a smaller file that is much easier for the OCR engine to process without hitting memory limits.
Where is the Acrobat temporary folder located on Windows?
By default on Windows systems, Adobe Acrobat uses the standard system temporary folder. You can access it by opening the Run dialog (Windows Key + R) and typing '%temp%', which typically directs to C:\Users\[YourUsername]\AppData\Local\Temp.
