Uninitialized string offset: 36

Uninitialized string offset: 36

how to find this error and what could be wrong.
I am so confuse and did not find this, its happen after run-button process.

any good suggestion to solve this issue.

thanks in advance.

a array bad.

array overflow.

Go to application and set all debug options to on. Then regenerate this error and hope that a filename and linenumber is shown. Then look into the generated code what caused the problem: code entered by yourself of generated code. Then start from there. This is too less info to go on to.