zoho.crm.getRecords has stopped working

I run custom scripts on our CRM database using the zoho.crm.getRecords function, carrying out mass update operations on some of the modules. It worked OK, aside from the fact that only 300-400 records could be processed at a time. This way I could update thousands of records in several modules.

Then, all of a sudden, the response from the very same script is:

Execution Failed Error occured please contact application owner.

I removed everything from the script, all left is this test line:

module_records = zoho.crm.getRecords("Vendors",1,1);

and it still fails. (Regardless of the module.)

What has happened? My mass update operations are interrupted, and the error message gives no hint what can be the problem. Please help.

Thanks

Zsolt Farkas