This might help you SOLVED The problem in IE7 is the tag "base", as you can see in this example, I added to the H5BP template responsive the tag "base" and now no longer works on IE7. So that's why it does not work on IE7.
this one helps. I have to remove the tiff files extracted into temporary directory after completing the required tasks (reading, calculating, and resulting the outfile). , Try to add this before the delete loop:
Internet Explorer 11 and earlier - does not respond to CSS column styling