Problem: When you enter a value on a BlackBerry device in an attribute of the BYTE type, you receive this error when submitting the data.
Explanation: This error can happen if the mobile business object is associated with a SQL Anywhere database. With SQL Anywhere, the tinyint column is automatically mapped to be an unsigned TINYINT type attribute, which can hold values from 0 to 255. However, if you manually map the tinyint column to a BYTE attribute, on BlackBerry devices, only values from 0 to 127 can be used.