In Windows XP's Windows Explorer, when I double click a .pdf file to open it the Adobe Reader comes up and then sometimes puts up a pop-up saying "There was an error opening this document. This file cannot be found". I have to click OK several times to get the pop-up to go down.
After some internet investigation I discovered if the file's path name has spaces then Adobe breaks the path into pieces at the spaces and interprets it as several file names. The advice I found on the internet was to have the launching application put double quotes around the file name.
The trouble is, in my case the launching application is Windows XP, and I don't know how to instruct it to add the double quotes.