I've been having a big headache trying to enter information to send an email with the scheduled report. When I re-open the rrd, a lot of the information is missing such as smtp server and associated fields. I suspect there are reserved characters. The body text is truncated when it reaches a question mark. There is a '&' in our company name which is used as an email signature. Is there any way to Escape these reserved characters or some other kind of workaround? At a minimum, there should be a list of these troublesome characters so I can work around them.

Try opening Logicity Solution Builder (Run) as Administrator to save changes to the RRD file.
And use the following link on how to handle HTML offending characters: www.freeformatter.com/html-escape.html.

Thanks... the escaped sequences allowed the '&' and '?' to work as intended. I think everything will run smoothly now.

I spoke too soon! The Escape sequences work within the Solution Builder, but not when the scheduled report is run. It's apparent that the text is not being read-in as is, rather the Escape sequences are converted to literals before the email is sent which causes the text to fail at the reserved character. I checked the .rrd file with a text editor and the Escape sequences are written correctly. It's okay, I rewrote the email body without the reserved characters and it should work fine. However, I think it may be a simple programming fix to read-in the .rrd without altering the Escape sequences.