Hi Jeff,
[quote user="jeff.clough"]We have an MDL application[/quote]
I recommend to read and follow MicroStation Programming forum best practices, especially rules about sharing mandatory information. From your post it's not clear even very important information if you are talking about some older MicroStation version, V8i or CONNECT Edition ... and if you are talking about MicroStation or some other product ;-)
[quote user="jeff.clough"]I am in the process of modernizing it by adding support for Named Levels and Custom Linestyles.[/quote]
It's a bit off-topic, but still related to development: Is such application, with respect to existing MicroStation resymbolization features, necessary? But I guess you need something more complex than straight simple resymbolization of elements created with "by level" attributes. In CONNECT Edition, Display Rules can be used also.
[quote user="jeff.clough"]The issue I'm having is trying to resymbolize...[/quote]
It's not clear how your code works, can you provide more details? Do you hook element display process (how?), stop it and provide own element instead of an original one?
[quote user="jeff.clough"]I understand that this issue is likely caused by the reference file not having the custom linestyle definitions loaded[/quote]
In my opinion there is nothing like "loaded by references": If a line style definition comes from RSC file, it's available for the whole session (active model and all attachments). Today the line styles can be also stored directly in a design file (if they were stored in dgnlib originally) and in such case I guess this definition is available for a specific reference only. But you mentioned you work with RSC.
[quote user="jeff.clough"]All thoughts and commentary are greatly appreciated[/quote]
Because I don't know how you code works, I can guess only: There are plenty of other settings related to reference attachments like reference presentation (view) attributes, attachment settings like scale etc. that influe how line style is displayed. If you place manually a target line style (element using this style) into the reference, is it displayed correctly?
With regards,
Jan