I was adjusting some end conditions that included guardrail. It had been showing up as the proper line style before, but after editing the line stopped appearing in the 2d view. However, it is still generating the end condition because the guardrail shows in the 3D model. Anyone have any ideas on why it stopped showing the line all the sudden? (All guardrail lines, not just the one I was editing and working on). The line style doesn't even have any components when looking at the level display to see if the level was accidentally turned off somehow.
As a test, can you try using the MicroStation place line command in your 2D model and use several different linestyles to place the line. Do they appear? If none of the linestyles appear in this view, I would advise checking the view attributes>linestyle to ensure it's toggled on.
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Other line style do appear, including the guardrail style when drawn in by hand. I also verified in my attributes that line styles is toggled on.
By chance, have you checked the feature symbology to ensure that the plan or default element template is pointing to the appropriate line style?
Another thing would be to check the level display for your default model.
As a test, you could also try changing the point feature definition in your template (assuming this issue is related to a corridor) then see if the new feature displays in plan view. If it does, change the point feature back to it's original FD.