When processing a transactions (e.g. order entry), an error message is generated 'Out of operating system limit'. This is due to the operating system settings.
To avoid this, review your settings:
In the config.sys, make sure it contains the following:
MS DOS settings are not set inside the config.sys. The FILES setting is not used but the PerVMFiles settings is used. This setting increases the number of available file handles in each MS DOS virtual machine. To set the setting, add the following line to the System.ini file, under the [386Enh] section:
Restart Windows ME/XP