Detect missing UserDataFader

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 18/01/2006 at 14:40, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   9.1&9.5 
Platform:   Windows  ;   Mac OSX  ; 
Language(s) :   C.O.F.F.E.E  ;

---------
Hi. I'm trying to figure out how to get a missing UserData slider on a tag to be detected as missing.
If it is missing I would like to make the script to bypass it instead of the Console reporting: "parameter access failed".

This is all using a COFFEE expression plugin Tag.
The tag have 25 UserData faders.

Opening an olders version, with only 24 UserData faders I do get the "parameter access failed" message.

So basically for backwards compability reasons I'd like to make this possible.
The problem I have is to find the correct version of:

if (MyTag->GetUserDataObject() != TRUE)
do this;
else
do that;

Cheers
Lennart

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 25/01/2006 at 04:39, xxxxxxxx wrote:

I don't think there's a way to know what parameters are avaiable. But you can use a try-catch block to catch the error:

    
    
    main(doc,op)  
    {  
      println("Before");  
      try  
      {  
        println(op#ID_USERDATA:3);  
      }  
      catch(ExLastException)  
      {  
        println("Error");  
      }  
      println("After");  
    }

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 25/01/2006 at 13:52, xxxxxxxx wrote:

Yes! Thank you very much. Works like a charm and will save loads of work loading older scenes.

Cheers
Lennart