Maximum size of the array ClassPnt exceeded

[dpucci]

Dear Seismosoft,
I'm trying to make an eigenvalue analysis but when I run the model, Seismostruct gives an error message : " Maximum size of the array ClassPnt exceeded. Analysis interrupted."
Is it because the modelling is too large to run on a PC with 4 GB of RAM or because I have a lot of element classes in my model? There is no limit on the number of element classes?
Thank you for your attention.

[z.gronti]

Dear dpucci,

The error message is related to program's memory limits. In the upcoming version 7 the memory limits of the program have been increased.
Zoi Gronti
SeismoSoft srl.