HI Maria
In general, when you mark a field captured in a recording as fixed, it should pass that fixed value up to SAP. But SAP has business rules built into tcodes that may change the behavior, such as making fields read only, not displaying fields, adding new fields, making fields required/not required, or deriving another value based on other inputs.
If you can provide a bit more info on what you're doing - which tcode - which screen - which field - the community may be able to help you.
Best Regards,
Sigrid
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Sigrid Kok
PSE | Winshuttle North America
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