Hi Alnasser,

It means Uniface is not able to read the signature of the component you've created (pop up form calendar). Signatures for Uniface components are created at compilation time in a .sig file; they are red at runtime before executing the component itself.

This error does not happen with Uniface development/runtime standard configuration; have you somehow customized your installation?

Regards,
Gianni

Hi Alnasser,

Are you sure the signature is in the UAR-File or at the specific folder  ".\\components\\sig"
If you can start the debugger before calling the calendar, then go to View->Settings->"I/O prints"
Select at least last the checkboxes.
Then activate the popup
In the message-frame/LOG-file you will find a hint where UnifACe tries to find the signature

Ingo

Hello Ingo

Thank you for reply, but I am working on community version and I can not find 

View->Settings->"I/O prints"  , would you please guide me where to find it.

Thanks and Regards

Hello Gianni

      I am working on community version of Uniface, and when I run the compiler , I did not notice missing signature message, 

As I understand that the community version is exactly as development with restrictions on mass use or marking use

Best Regards

Hi Alnasser,
Do you know hoe to start the debugger?

If you don't use to the debugger
Just before the "newinstance" resp. "activate" write the following line in your component
ENTRY LP_DO_CALENDAR
  variables
     string  v_INST_CALENDAR
 endvariables
...  ; other programm code
  putmess "Hello World, I will start with debug flags"
  $ioprint=1023  ; This is set all debug flags to ON
  newinstance "CALENDAR",v_INST_CALENDAR
  activate v_INST_CALENDAR."operation"(parameter1,parameter2)
  $ioprint=0 ; all debug flags OFF
  deleteinstance v_INST_CALENDAR.
  putmess "end of debug"
...
Start your application and try to open the calendar
Have a look into the message frame and/or the LOG-File

BTW: To start the debugger just use the statement "debug"
e.g.

...
 $1 = 5/6
 debug  ; this starts the debugger in an extra window. Do not close the debugger as this will shutdown the Uniface at well :-)
 $2 = 3/4

...