Upon saving a .csv outlook attachment the resulting file is corrupted, first 2 lines opened in note pad:

"PNG
IHDR   
sRGB  pHYs  + tEXtSoftware Microsoft Office5q IDAT8OkAǿ3;٦?9-A*I("

This is the relevant part of the code:

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The file I have been using to develop the script is the exact same file, just sent as an attachment at an earlier time. When I save this same .csv to my desktop and open in notepad to compare to the wire that wasn't corrupt the files appear identical. Any help would be appreciated, thanks.