We have a Windows Server 2008 R2 SP1 server with the File Services role and the Windows Search service installed. We do not have the Indexing service installed. There is a piece of software that process PDF's and spits out a .img file into a specific folder that contains plain text. Our users need to search for a specific string within these files - '9999' to be exact. Anyway, we have noticed some inconsistencies as it does not always file the '9999' string. As a test, I put 2 .img files that I know contain this string in a sub folder. The search only found the string in 1 of the 2 files. However, in the file it did not find this sting in I can search for any other piece of information and it finds it.
Under Index Options in the Control Panel I have this folder set to index. I have also verified the .img extension is a file type to index. If I look at the properties of that file the option 'Allow this file to have its contents indexed...' is checked as well.
Any reason why the Search service is only finding this string in some of the files and not all of them? Or why it could search for other information in the file and not this string? Any help would be greatly appreciated.