# Troubleshoot report generation Use this checklist when report generation fails, runs slowly, or returns unexpected data.

Issue	Likely cause	What to do
Empty report	No records match the filters	Review the filter values and date range.
Slow performance	Large dataset or broad query	Add filters and reduce the date range.
Memory error	Large file built in memory	Split the report into smaller runs.
Missing approvers	Legacy data format	Review older workflow and approval data.
Wrong data	Stale cached objects	Clear cache between test runs if needed.
Date parsing error	Invalid date format	Verify the input format and locale handling.

### Tuning tips Start with the smallest useful scope. * test with a narrow date range * filter by user, managed system, or status * download one report at a time during validation ### When performance matters Focus on these areas: * pagination size * service call volume * ElasticSearch usage * memory usage during file creation Large reports work best when you reduce result size early and avoid broad unfiltered queries. --- # 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-beta.openiam.com/openiam-report-services/troubleshoot-report-generation.md?ask= ``` 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.