| Return Value | Likely Cause |
|---|
| 0 | Function failed |
| 1 | Function succeeded |
| 158 | Serial port in use; select another port |
| 159 | Serial port not found; select another port |
| 160 | Unknown serial port error |
| 165 | Illegal stop-bits value; serial port settings incorrect |
| 166 | Illegal word length value; serial port settings incorrect |
| 167 | Illegal parity value; serial port settings incorrect |
| 168 | Illegal baud rate value; serial port settings incorrect |
| 169 | Serial port receive warning; check for noisy serial connection |
| 177 | Serial port receive time-out; check time-out value in use |
| 178 | Network/serial connection in use; close existing connection |
| 179 | Unable to initialize serial port |
| 180 | End of file found when not expected; corrupted object file |
| 181 | Bad file position found in file; corrupted object file |
| 182 | Bad file length; corrupted object file |
| 183 | Bad object record; corrupted object file |
| 184 | Not a DSO file; corrupted object file |
| 185 | DSO file has different architecture type than destination controller |
| 186 | Quickstep object (DSO) file not found |
| 187 | Quickstep file (DSP, FIG, TAB, or DSO) not found |
| 194 | Failed network connection; cannot access network |
| 195 | Unknown remote node; controller node cannot be found on network |
| 196 | Unsupported remote operation; cannot perform action over network |
| 205 | Bad response protocol; message not a binary protocol message |
| 206 | Bad response; message not for requested data |
| 214 | Bad response length; message fails length test |
| 215 | Bad response checksum; message does not pass checksum test |
| 216 | Out-of-range; data requested does not exist (e.g. Flag 33) |
| 235 | Network not ready; make sure network connection is in use |
| 236 | Network communications time-out; check time-out value in use |
| 246 | Windows timer not accessible |
| 255 | Unknown network error |