| Class | Description | |
|---|---|---|
 | HEServicesBase | Base class for all HEServices exceptions; |
| InvalidConverter | This exception is thrown, if the given converter does not exist. Functions from classes DeviceService and PartsService use it. |
| InvalidScheme | This exception is thrown, if the given scheme does not exist. Actions and classes from HeSrvices use it. |
| InvalidVariant | This exception is thrown, if the given variant of WindowMacro does not exist. |
| NOPLCCPU | This exception is thrown when no Plc CPU found in project. Functions from classes PlcService use it. |
| PrinterMissing | Class needed by HEServices.Print; This exception is thrown when Print.pages() doesn't find printer. |
| UnknownPrinter | This exception is thrown, if the given printer does not exist. |