keytool error :java.io.IoException:Incorrect AVA format
Probably you entered illegal character(something like,(comma)) in a field for Name, Organization or somewhere else.
Of course, if you really want some character can be escaped with \ sign
"+" (plus sign) sign also causes this issue. (People often tend to use + sign for the country code field)
I have faced an error while trying to export a signed .apk file with Eclipse ADT. The error was same like your error. In my case, I used a + sign before the country code. By removing the + sign from this name fixed the problem and allowed me to fully export my signed .apk file. Also, this error can occur when use comma,slash, semi-colon, quotation.
You tried to use special characters while exporting apk.You can't use these special characters in any field shown while creating the apk. The special character set includes:
- Commas (,)
- Addition symbol (+)
- Quotation mark (")
- Back-slash ("\")
- Angled brackets(< and >)
- Semi-colon (;)