You are just under the 2GB limit. Apparently the file becomes unusable. From a VFP forum: ____________________________________ Dan Olsson (Programmer) 12 Mar 15 19:37 No it is 2x1024x1024x1024=2 147 483 648 and I have sometimes been going over that limit by appending records, which immidiately renders the dbf useless. BTW the 2GB limit also applies to CDX- and FPT-files Mike Lewis (Programmer) 12 Mar 15 19:50 Yes, I've seen it many times, and I'm sure others have as well. As Dr. D implies, a gigabyte is 1024 megabytes, and a megabyte is 1024 kilobytes, and kilobyte is 1024 bytes. Put another way, a gigabyte is 2 the power of 30 bytes. And it doesn't only apply to DBFs, CDXs and FTPs. It applies to any file that can be opened in VFP. That even includes text files. And it makes no difference how you try to open those files. So using low-level file access won't help. Just about the only way to read those files in VFP would be to use some external component. ____________________________________ Kevin -----Original Message----- From: Erik Hov Sent: Tuesday, November 21, 2017 5:49 AM To: 'The Master Genealogist Rootsweb Email List' Subject: Re: [TMG] 2Gb file limit Just wonder what do you mean when saying unusable? The project_n.cdx file I have at current is now 2.066.031 kb....what is unusable ,what can`t be done when it is over 2GB? (I haven`t optimized etc for some weeks)