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I wanted to check the responses of a participant. At token management > Display tokens, Completed?-column, the answer is Y (yes). But when I go to Responses > Responses & statistics > Display responses, a lot of ID codes and responses of participants who completed the survey are not displayed. And when I export the responses to SPSS, also a lot of ID codes do not appear in the data. What goes wrong?

Difficult to say with the information that you are providing. What are you referring to with "ID codes"? Tokens? Or the response ID created by Limesurvey?

What I can say is that your version of Limesurvey is quite outdated though.

With ID codes I refer to the column called [id] Response ID in the following page: Responses > Responses & statistics > Display responses. And to the column called ID in the following page: token management > Display tokens. So the response ID created by Limesurvey I guess.
What more information do you need?

The ID columns in the token table and response table are not related columns are not related. They are merely sequential IDs generated when a token is created or a response is submitted.

You will need to use the token to establish a relationship between the tables. (but only if the survey is non- anonymous)

Thanks for your reply, that helps!

T-partner answered that perfectly.