Hi, my project was initially using Activities. Everything was running fine. I switched to using B4XPages. "B4XPage_BOE_DataDocumento" I use it to display information from a document: reference, date, keywords, previous and subsequent references, ... I initialise this B4XPage with the identifier of the document I want to view and then I open it. If I click on an ID of a document before or after the current one, "B4XPage_BOE_DataDocumento" shows me the data of that new document, but once that data has been shown I no longer have the option to see the initial document again, since "B4XPage_BOE_DataDocument" has been reused and when I click on the back arrow it no longer goes through "B4XPage_BOE_DataDocumento".
In any case, I have used Activity again to display the document information.
Thank you
Rubén