custom PDF name from Record Summary

Hello everyone,

following this forum i tried to use a custom action in order to download pdf from a record summary with a customized name (for example the number of an invoice or something else)

i've found this function and i've adapted it to my needs

void scaricaPdf.scaricaPdf(Nuova_Fattura Numero_Fattura)

{

openUrl(" https://creatorexport.zoho.com" + zoho.appuri + "record-pdf/Elenco_Fatture_Estero/" + Numero_Fattura.ID+ "/customName", "new window");

}

everything was compiled correctly but when i try this command i received a blank page where i only found this phrase

"An error has occurred. It has been reported to Zoho Creator support. We will look into this issue .
Sorry for the inconvenience caused."

I'm sure I'm doing something wrong but i can't understand where, someone has idea of what i'm doing wrong?

thank you very much