/products/road___site_design/b/road_and_site_design_blog/posts/error-messages-given-when-installing-watercad-ss3-with-inroads-ss2-quot-os-could-not-load-c-program-files-bentley-inroads-group-v8-11-bin-gpkcoreroadat-2-0-dll-error-127-quot-and-quot-mdl-loader-unable-to-load-library-dll-orGo to C:\Program Files\Bentley\MicroStation V8i (SELECTseries)\MicroStation\config\appl and edit the WaterCAD.cfg file. The last line of the file says, “MS_LIBRARY_PATH < $(MS_WATERCAD_ROOTDIR)”. Change the < sign to a > sign and the issue will be resolveden-USTelligent Community 12