Lianja v4.0 APaaS Developer will not run on XP. Lianja App Builder will but some of the important features for developers will not be available for Lianja App Builder.
This is due to the fact that some of the technologies we will be incorporating into Lianja v4.0 APaaS Developer will not install or run on XP.
Windows 7 and upwards will be supported.
the maximum number of columns in a table is 256, according to http://www.lianja.com/doc/index.php/System_Capacities.