How to conduct multiple rounds of conversation around an uploaded file?

[Copilotes]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

As title, how to conduct multiple rounds of conversation around an uploaded file?
Even within the same session, it seems that the LLM can only discuss the content of the file once I uploading , When I ask again, it does not know it.

2. Additional context or comments

I tried storing this file in a public variable, but it still doesn't seem to work well.

[hjlarry]

can you try the gemini models in an agent app, to check whether it works first ?