We utilize the functionality of having many sheets within one drawing file. We use a title block consisting of an area that shows the particular sheet number "of" the total sheets.
I am currently using the field system variable
%<\AcVar ctab \f "%tc1">%
to indicate the current sheet (eg. 1 in Fig. 1) and it works great!
I also want to reflect the 'total number of sheets', or the last sheet in the drawing file as well (represented as a dash in Fig. 1 - this might change throughout the development of a particular project).
Is there a Field System Variable to accomplish this?
I use the CTAB variable to get a field to read my tabs for the individual sheet numbers (my tabs are named 1.0 2.0 2.1 etc). For all information common across many sheets (such as project address, or total sheets), go to Drawing Properties --> Custom tab. Here you can define any custom field you desire, and give it a value (such as total number of sheets). If anything changes, here is where you make those changes. I also store my drawing files under their job numbers, so you can imagine I have a field that grabs that info too. And if your fields ever go "dumb", try making sure FIELDEVAL = 31...
If by some odd chance my nattering was useful -- that's great, glad to help. But if it actually solved your issue, then please mark my solution as accepted