I was downloaded a Solidworks file (i.e, in .SLDPRT) directly from internet on yesterday.Since i dont have Solidwork Software, I cant convert that file into IGES format.Would u please convert that .SLDPRT into .IGES type. . .
If you need to convert a file again in the future you can use GrabCAD Workbench. Upload you sldprt file to workbench then you can right click on the uploaded file and select "download as". You can download the file in the format of STEP, IGES, STL, Parasolid, ACIS, JT, or VRML.
If your still struggling I'd advise you to check out my tutorial for converting files in Workbench
How to convert CAD files in Workbench