Using Power Inroads version 8.11.7.566 (which is .536 with update) I am finding that if you attach a PDF as a raster reference, the next time you load the DGN drawing it will fail to load the drawing, leaving the hourglass (please wait) cursor in an endless loop. This is documented in Bentley TR 65461 allocated against Bentley Inroads v8.11.7.494. Bentley document in that Trouble Report a solution (ID=500000084528) stating that removing the PDF raster attachment will resolve the issue. It might resolve the issue to allow the drawing to load, but fails to outline a solution should you want to retain the PDF attachment. It is also a catch 22 situation in that you cant detach the image if you cant load the drawing in the first place, so you must hope you have a backup of the drawing somewhere.
I have searched the FTP site for subsequent versions of Power Inroads (ftp://ftp.bentley.com/pub/help/power_inroads/) but cant seem to find mention of this problem, nor an entry in the 'known issues' or 'bugs fixed' paragraphs.
Does anyone know of the solution to this issue, where I can retain the PDF attachment?