Thanks for your inquiry. Please note that there is no size limit of document you can generate using Aspose.Words. The only limit is the amount of RAM available on your side.
Usually, Aspose.Words needs 10 times more memory than the original document size to build it’s DOM in the memory and when it comes to rendering a document to fixed page formats (e.g. PDF), Aspose.Words needs to build two model in the memory – one for document and the other for rendered document.
In terms of memory, If you are loading huge Word documents into Aspose.Words’ DOM, more memory would be required. This is because during processing, the document needs to be held wholly in memory.
Could you please compress your document, you’re getting this problem with, in .rar or .zip format and share it via SkyDrive
or any free file sharing service. Once we have your input Word document, we will investigate it on our side and provide you more information.