Sometimes, if the archive wasn't actually split, you can simply right-click the file, select 7-Zip > Open Archive , and see if the contents appear. You can then extract them.
Check the file size. If it is extremely small (a few kilobytes), it might be a corrupt file or a text file with the wrong name. If it is several megabytes or gigabytes, it contains legitimate data. tintinvcam7z001 link
