[TRNSYS-users] IDF import problem

[mohamed sarmouk]

Hello,
I recently updated Trnsys v18, and when i tried to import a idf file that i
made using trnsys3d, it doesn't import and a file (*.txt) is created when i
checked it in Calculation of geometry information start it says :
- Check base surface 6. Outside Boundary condition of base surface must be
''External'' or ''Zone''!

1- How do i know which is surface 6 in trnsys 3d ?
2- I thought it's the base surface and i changed it to "outdoors" still
same problem

Thank you.
M.SARMOUK
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