Major Error with YouMail!

I discovered a major error specific to the bb app. When a phone number comes in, such as a business, where the number is shielded, sometimes coming in only as 3 to 5 digits, when the app tries to get mail box, "uncaught exception" will pop up saying cannot format number, In my case 50854. At this point, the app becomes useless and closes everytime.

I deleted the app, reinstalled it and tried it again from my office phone... same exact thing! I sent youmail an e-mail concerning the flaw and am awaiting. But as of now, if it happens you get a call like this, your youmail app will have to be deleted entirely so BEWARE!!!