App builds but will not install

[Jim sims]

Have an iPad app that would install and run ten days ago.

Did some work on it (it does not use externals) - builds fine - when
synched to my iPad it will not install.

Same ios application settings as before , in the one that installed and
ran. No dialogs popping up with warnings. Just will not install.

Any suggestions on where to look for a cure?

TIA
sims