wcs slightly rotated when applying coordinate systems

[caruivo]

When I select a coordinate system to my dwg file, the north rotates slightly

Any idea why it rotates?

Thank you

[Pointdump]

Hi Carlos,
I've seen that with custom coordinate systems and sometimes when using the Transformation Tab. Can you post your drawing?
Dave

[caruivo]

Hi @Pointdump,

I send you a file where I found this issue. It has associated a custom coordinate system.

Thank you

[Pointdump · Accepted solution]

Carlos,
Thanks for posting your drawing.
PT-TM06/ETRS89 is a bad definition in MAPCSLIBRARY. Use instead ETRS89/PT-TM06, which matches >>>EPSG:3763 ETRS89 / Portugal TM06<<<.
Dave

[Pointdump]

Carlos,
To give a visual, the GeoMarker at the center of Bing Live Maps extents is normally on the Central Meridian, so would be a Convergence of zero. Wierdly, the pie-shaped extents of PT-TM06/ETRS89 are rotated.
Dave

[caruivo]

Well, I tried to open the same file in another computer that also use the same auto-registered coordinate system, and the rotation of the north doesn't happen.. so I deleted the auto registered coordinate system, an created it again (by opening a file with that) and it works.

I have no idea what could happened.

Thank you for your help @Pointdump