Error when Opening the Attribute Editor: Table Definitions Cannot Be Read

Problem

When opening certain attribute forms, the form remains empty and this error message appears:

All objects of the tables av_einzelpunkt, av_hfp, av_hhgrenzpunkt, av_lfp, av_ligrenzpunkt are affected. 

Cause

The cause is the line "<valid_range min="0.0" max="700.0" />", which appears in the table definitions for various attributes. 

This point/comma notation may not be recognized depending on the language and region settings of the used computer. Regardless of the set country/region (e.g., Germany, Austria, Switzerland), regional formats such as "German (Austria)", "German (Germany)", and "French (Switzerland)" can trigger this error message.   

Solution

In the system settings, the decimal symbol can be set in the "Number Format" section. If a "," is set, it must be changed to ".". 

Alternatively, in the "Language and Region" section, the regional format can be changed to "German (Switzerland)" or the points in these lines can be changed to commas directly in the affected XML files. 

After restarting GEONIS/ArcMap, all attribute forms can be opened and edited normally again.