# 'Missing plugins' error when a transformation or job is opened

If you try to open a transformation or job that contains a step or entry not installed in your copy of the PDI client, the following error message appears:

![Image shows an example of the missing plugins message](/files/5kNoGxxlgLGikzSE4b5v)

To resolve this issue, either add the step or entry in the PDI client or find it in the marketplace and install it. See the [Use the Pentaho Marketplace to manage plugins](/pdia-data-integration/9.3-data-integration/advanced-topics-pentaho-data-integration-overview/use-the-pentaho-marketplace-to-manage-plugins.md) article for details.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/data-integration-issues/troubleshooting-transformation-steps-and-job-entries/missing-plugins-error-when-a-transformation-or-job-is-opened.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.