Hi Petr,
could you please try and test the attached ThinAIR executable with a quite complex script that contains BEGIN CONST, WITH, TBGL_NewList, TBGL_PushMatrix and TBGL_BeginPoly and let me know the results? Thanks.
Notice that in the meantime I added in the context menu (right click on script area) one item for insert some predefined code blocks, it's just a draft.
Ciao,
Roberto