hi,
when i want to submit the form error like this apear :
Error while submitting the form.
why ?
The reason will be shown in the log, this is what you have to analyze (and also share with us if you need more help). The log can be found under Help menu in the Studio, choose Engine log.
i found it
i think i was on this line
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
i fixed the error , and solve the problem , but i diidnt understand meaning of above error
Good to hear that you resolved your problem. When you look in the log, you should have a look at the entire stack and not only one line and it would be easier to understand the cause.