Group Text Messages 2 (Maximum Number?)

Didn't want to highjack the other thread so I created this one.

I have a Distribution List set up on my 900 with 14 people. I can email to them just fine, but when I try to send a group text I get "can't send message, try again".

Is there a maximum number of recipients on a text distribution list? I can send individual texts just fine and I have confirmed the phone numbers are correct.

Any help or ideas appreciated.

I believe the max is 20. I have experienced this too, try sending the text with Wifi Off and you might have a different outcome. All group messages are sent as MMS messages so it uses data (thou not charged as data). Also make sure you have 3g, 4g or LTE on the indicator on your phone.