Claris Resolve has a maximum cell capacity of 32,768 rows by 32,768 columns, provided you have enough memory.
How much memory?
A 1000-row by 1000-column worksheet, including numbers 1 through 1,000,000, requires a minimum of 17MB allocated to Claris Resolve. Even at this setting, you may not have enough memory to perform all operations, but the worksheet will open. Complex operations will require additional memory.