Eliminating ShadingBuilding object crashes simulation

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You can add Output:Diagnostics to show all the warnings in the err file.

!-   ===========  ALL OBJECTS IN CLASS: OUTPUT:DIAGNOSTICS ===========

Output:Diagnostics,
    DisplayAllWarnings;      !- Key 1

After running No shades.idf, you will see the following severe error message in the err file.

   ** Severe  ** Problem in interior solar distribution calculation (CHKBKS)
   **   ~~~   **    Solar Distribution = FullInteriorExterior will not work in Zone=CUARTO_7
   **   ~~~   **    because one or more of vertices, such as Vertex 3 of back surface=ROOM_A1BEA5FB..FACE_75CD6136, is in front of receiving surface=ROOM_A1BEA5FB..FACE_551FD6FB
   **   ~~~   **    (Dot Product indicator=              0.7952)
   **   ~~~   **    Check surface geometry; if OK, use Solar Distribution = FullExterior instead. Use Output:Diagnostics, DisplayExtraWarnings; for more details.

Please change Solar Distribution in Building from FullInteriorAndExteriorWithReflections toFullExterior or FullExteriorWithReflections, and your simulation will complete successfully.

!-   ===========  ALL OBJECTS IN CLASS: BUILDING ===========

Building,
    Building 1,              !- Name
    0,                       !- North Axis {deg}
    City,                    !- Terrain
    ,                        !- Loads Convergence Tolerance Value {W}
    ,                        !- Temperature Convergence Tolerance Value {deltaC}
    FullExteriorWithReflections,  !- Solar Distribution
    ,                        !- Maximum Number of Warmup Days
    ;                        !- Minimum Number of Warmup Days

Please refer to the I/O Reference. It says "if the zone is not convex you should use Solar Distribution = FullExterior instead of FullInteriorAndExterior." Your model has some non-convex zones.