I get this message every time I open edit texture dialog and there is no preview of the tile or cube or globe in preview window. I'm not even reach to change the values, happens with every texture I use. Is there someone else with this problem? I don't know if is after reinstalling XP and SP3 update? Or my graphic card new drivers? Before was working nice.
The "Illegal value" error message can also be caused by the numbering system used by your OS. Strata expects numbers to be in the English format 1,234.56. Other languages use different symbols to separate thousands from hundreds and decimal from whole portions of the number and this can cause us problems.
Go to the Regional and Language Options Control Panel and set your Standards and formats setting to English.
Which language and numbering system are you using?