In crystal when you add tables and even join them they do not alter your data set unless you set the join to be enforced or unless you use fields from both tables in the join. So you can see your run time and data set change drastically by just adding a field to the report as it enforces the join.
I also cannot tell based on your description which table was actually aliased.
the description of the report behavior sounds more like your report data set increased drastically.
do you have page n of m in the report,
take it out and see if you can at least see the reports first page when you run it.
so what was aliased?
IP Logged
