Both .ism and .aat files originate from ArchiCAD and are used for some of its default file types. However, whenever some sort of conversion is useful or even possible between these two file types could not be reliably verified. If you know more about this conversion, please write us any useful information in the discussion below.
Convert ArchiCAD Geometric Description Language file to ArchiCAD attribute transfer file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert ism to aat on Windows
One of the architecture CAD software programs
Convert from ism file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.