Catching failed lookups from zoho.crm.getRecordById

Catching failed lookups from zoho.crm.getRecordById

I’m using Zoho Creator to pull record information from Zoho CRM, using the method zoho.crm.getRecordById, as such:

potential = zoho.crm.getRecordById("Potentials", My_Zoho_CRM_ID);

When My_Zoho_CRM_ID is an ID that exists in the CRM, everything works fine. However, when My_Zoho_CRM_ID does not exist in the CRM, I’m given the following error:

Error in executing Set Variable task. Unable to update template variable potential.
      Error evaluating MAP expression :

Is there any way to catch this error?

I’ve tried throwing a block checking if potential is null but that doesn’t work as the error is thrown before that– seemingly when the getRecordById method fails.