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Auto-extensible object crashes IDF Editor

Dear UMH forum, My IDF has a Controller:MechanicalVentilation object with a lot of Design Specification Zone Air Distribution Object Name zones. I can run the IDF in both v8.6 and v8.7, but the IDF Editor crashes when I attempt to open the IDF, telling me that the :MechanicalVentilation object has too many fields. I can also see in the status window that E+ is auto-extending that object (and the message ".. simulation may be slow..")

Is there a bug here? or something I am missing?

p.s., I'm being lazy because I don't want to edit the IDD; it seems that if the IDF runs, the IDF Editoor should open the file....

Auto-extensible object crashes IDF Editor

Dear UMH forum, My IDF has a Controller:MechanicalVentilation object with a lot of Design Specification Zone Air Distribution Object Name zones. I can run the IDF in both v8.6 and v8.7, but the IDF Editor crashes when I attempt to open the IDF, telling me that the :MechanicalVentilation object has too many fields. I can also see in the status window that E+ is auto-extending that object (and the message ".. simulation may be slow..")

Is there a bug here? or something I am missing?

p.s., I'm being lazy because I don't want to edit the IDD; it seems that if the IDF runs, the IDF Editoor should open the file....