> For the complete documentation index, see [llms.txt](https://bpmflow.gitbook.io/project/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bpmflow.gitbook.io/project/application-manuals/backoffice-manual/main-menu/processes/define-new-process/import-errors-codes/unsupported-elements-error-codes.md).

# Unsupported elements error codes

All the following errors are produced when a **Process Definition** has **non** supported **BPMN** element. Time to time some elements are supported and removed from this list.

**700 - Attached Message Event**<br>

**704 - Business Rules Tasks**<br>

**708 - Compensation Events**<br>

**712 - Complex Gateways**<br>

**716 - Conditional Events**<br>

**720 - Error Events**<br>

**724 - Escalation Events**<br>

**728 - Manual Tasks**<br>

**732 - Multiple Events**<br>

**736 - Parallel Multiple Events**<br>

**740 - Receive Tasks**<br>

**744 - Service Tasks**<br>

**748 - Signal Events**<br>

**752 - User Tasks**<br>

**756 - Multi-Instance Sequential Loops (parallel loops are supported)**\
Check: `BpmProcessInstance>>createNewTransition:from:`\
Check: `BpmMultiInstanceTaskLoop class documentation`\
Check: `BpmStandartTaskLoop class documentation`<br>