How can a text thread disappear from my phone?

[AC Question]

The entire thread of texts between my son and I has disappeared from my phone and now when I try to text him I receive an "unable to send text" message. This happened after I had sent him a text that included a picture. I can still receive texts from him. No other text threads seem to be affected. How can I fix this please?

 

[Rukbat]

Try installing a different text app and let us know what happens.

 

[B. Diddy]

Welcome to Android Central! If there wasn't anything extremely valuable in that thread, then try going to Settings>Apps, select the Messaging app, and Clear Cache/Clear Data, then Force Stop. Now open it again, and see if you can text him again.