zz_getxd Disabled?

[BlackBox]

I've used (zz_getxd ###) earlier this year, in order to extract information from the "ADCADD_ZZ" block within AutoCAD 2009 Civil 3D Land Desktop Companion.

The problem I'm having, is that this function no longer returns the information it once did. For example, I'd use these to get the drawing scales:

(setq vertScale (zz_getxd 341))
(setq horzScale (zz_getxd 342))

Oddly, I even went back into an old drawing using 2006 LDT, and the function returns nil there too.

Is there another way of getting a drawing's scales?

[RobertB]

Posting a sample drawing and telling us what are the known scales would help us answer your question.

[BlackBox]

I've discovered part of why I had trouble querying the information I was seeking...

I'm unsure if this is the case for all verticals, but I've become aware that AutoCAD 2009 Land Desktop Companion requires that (cr_mnl) be loaded before the information I seek is available for the "zz_getxd" function.

Prior to (cr_mnl) being loaded:

Command: (zz_getxd 342)
nil

After (cr_mnl) is loaded:

Command: (cr_mnl)
 
Command: (zz_getxd 342)
40.0

Either the zz_getxd function is unavailable, or the extended data has not yet been populated prior to cr_mnl being loaded (I'm not sure which). I believe it to be the former, any clarification would be appreciated.

In my earlier posts regarding an Object Reactor (link below), I used the zz_getxd function as a litmus test to determine when the appropriate scale was being changed. What I did not recognize until today, was that at that time, I had always been loading (cr_mnl) by attaching to an alignment, listing a profile elevation, or even printing cross sections.
http://forums.augi.com/showthread.php?t=115384

As for the known scales, that varies for each master type... We use either H 40' x V 4', or H 20' x V 10'. If you still feel that a drawing needs to be posted, I can do so, but this appears (to little ole' me) to be a topic based in AutoCAD's "Land" component, and not a drawing issue.

Thanks,