Comparing two documents using i-net PDFC may require an extensive amount of memory. Although a sophisticated caching mechanism is used, the comparison requires to keep several pages of both documents in memory at runtime.
Potential causes for the application to run out of memory:
- the documents contain very large high resolution images
- the documents contain an extensive amount of drawing elements per page; e.g. technical drawings, maps or circuit diagrams
- both documents have many differences - at least several tens of thousands
- the startup settings for java applications has a very low memory limit
Possible solution - Increasing the memory of i-net PDFC
By default a Java Program such as i-net PDFC will take 1/4 of the memory available on your system as its maximum. You can give i-net PDFC more memory if you need to compare large documents.
To do this you must set the -Xmx command line option to some larger value.
- Xmx1024m for 1024MB maximum
- Xmx2g for 2GB maximum
In your installation folder, open the properties of your i-net PDFC shortcut (Right-click and select Properties). In the Shortcut tab you will find the Destination like
“C:\Program Files\i-net PDFC GUI\jre\bin\javaw.exe” -cp “C:\Program Files\i-net PDFC GUI\java\PDFCGui.jar” com.inet.pdfc.Startup
Add the Xmx option here like
“C:\Program Files\i-net PDFC GUI\jre\bin\javaw.exe” -cp “C:\Program Files\i-net PDFC GUI\java\PDFCGui.jar” -Xmx1024m com.inet
-Xmx must appear in front of com.inet.pdfc.Startup!
Open the executable file /usr/bin/i-net PDFC with an appropriate editor. It should look like
java -cp “/usr/share/i-net-pdfc/java/PDFCGui.jar” com.inet.pdfc.Startup “$@”
Add the Xmx option like
java -cp “/usr/share/i-net-pdfc/java/PDFCGui.jar” -Xmx1024m com.inet.pdfc.Startup “$@”
-Xmx must appear before com.inet.pdfc.Startup!
Open the /Applications/i-net PDFC.app/Contents/Info.plist with an appropriate editor.
Add for example -Xmx1024M under JVMOptions.
If you do not have an appropriate editor you can edit the file with a text editor and add the -Xmx as a value after the JVMOptions as follows