How to Fix Acrobat Compare Files Out of Memory Error
Question details
Users need to resolve an issue where Adobe Acrobat fails to compare PDF documents due to memory limitations.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Comparing visually complex or design-heavy PDF documents, even those with a low page count.
- Observed behavior
- The application hangs, takes an excessively long time (over 30 minutes), or crashes with an out-of-memory error during the comparison process.
Before troubleshooting, ensure you close all other background applications and memory-intensive software to maximize your system's available RAM.
Update Acrobat and Optimize PDF Elements
Installing the latest software updates and reducing the complexity of the PDF elements can prevent memory allocation failures.
Out of memory errors during document comparison are frequently caused by unoptimized high-resolution graphics, complex vector paths, or software bugs that have been patched in more recent application releases.
Open Adobe Acrobat, navigate to the 'Help' menu at the top, and select 'Check for Updates'. Follow the prompts to ensure you are running the latest version with current memory management patches.
Open the heavy PDF, go to 'File' > 'Save as Other' > 'Optimized PDF'. In the settings window, choose to downsample high-resolution images and discard unnecessary background objects, then save the new file.
Navigate to 'Tools' > 'Compare Files', select your newly optimized PDF documents, and run the comparison process again.
Split the PDF into Smaller Sections
If optimization degrades the quality of your design PDFs too much, splitting the document reduces the memory load during comparison.
Manage and Split Complex PDFs Easily with WPS Office
If heavy PDF editors are constantly freezing your system, WPS Office offers a lightweight, memory-efficient PDF tool. You can easily open, edit, and split design-heavy documents without overloading your system memory.
- 1. Open WPS Office: Launch WPS Office on your computer and select the 'PDF Edit' module from the main dashboard.
- 2. Import Your Design PDF: Click 'Open' to load your heavy design PDF. The lightweight rendering engine ensures fast loading times even for graphics-heavy files.
- 3. Split or Compress the File: Navigate to the 'Page' tab to use the 'Split PDF' tool, or go to the 'Tools' tab to compress the file size, easily breaking down the file for comparison.
Frequently Asked Questions
Why does Acrobat run out of memory when comparing short PDFs?
Short PDFs can still cause memory errors if they contain unoptimized high-resolution images, complex vector graphics, or unflattened layers that require significant processing power to render and compare pixel-by-pixel.
Can increasing my computer's RAM fix this error?
It may help if you are using a 64-bit operating system and a 64-bit version of Acrobat, which can utilize the extra RAM. However, 32-bit versions of the software are hard-capped at 2GB of memory regardless of how much total RAM your computer has.
How do I check if my Acrobat is 32-bit or 64-bit?
Open Adobe Acrobat, go to the 'Help' menu, and select 'About Adobe Acrobat'. The version number displayed in the pop-up window will be followed by either '32-bit' or '64-bit'.
Will compressing the PDF affect the comparison results?
Compressing or downsampling images may highlight minor visual differences if the compression alters pixel rendering, but it will not negatively affect the text or structural comparison of the document.
