UX: Improve 'invalid params provided' error

David · August 11, 2025, 4:02pm

Users don’t know how to resolve this error, and we don’t auto-fix it:

The FSRS context isn’t apparent to the user

rslib/src/scheduler/fsrs/error.rs

f3b4284af


      
          
          impl From<FSRSError> for AnkiError {
              fn from(err: FSRSError) -> Self {
                  match err {
                      FSRSError::NotEnoughData => AnkiError::FsrsInsufficientData,
                      FSRSError::OptimalNotFound => AnkiError::FsrsUnableToDetermineDesiredRetention,
                      FSRSError::Interrupted => AnkiError::Interrupted,
                      FSRSError::InvalidParameters => AnkiError::FsrsParamsInvalid,
                      FSRSError::InvalidInput => AnkiError::InvalidInput {
                          source: InvalidInputError {
                              message: "invalid params provided".to_string(),
                              source: None,
                              backtrace: None,
                          },
                      },
                      FSRSError::InvalidDeckSize => AnkiError::InvalidInput {
                          source: InvalidInputError {
                              message: "no cards to simulate".to_string(),
                              source: None,
                              backtrace: None,
                          },

Maybe using something similar to deck-config-invalid-parameters (if the error is similar):

The provided FSRS parameters are invalid. Leave them blank to use the default parameters.

sorata · August 11, 2025, 5:24pm

I’m more curious about where these errors are coming from. I have seen them around here recently but upon testing, it seems Anki doesn’t even allow saving invalid params.

So I was under the assumption that it’s people with some old versions of Anki who are facing the issue.

dae · August 19, 2025, 7:01am

Logged on UX: Improve ‘invalid params provided’ error · Issue #4278 · ankitects/anki · GitHub

Agreed that we should fix the cause of the underlying issue, but I’m not sure what it is yet.

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UX: Improve 'invalid params provided' error

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