Selenium IDE showing error in click command.. hw to resolve this error

Selenium IDE showing error in click command, When i test redbus.in website, to search buses, gave source , destination and date of journey as 19 i clicked the date and clicked on search buses button. getting error in date. error like:[error] Element link=19 not found... hw to solve it?

Code:

click | id=calendar

use this command to open calender..
When your script is running calender is not getting open so IDE failed to find element link=19.
So change the command for calender then your code will run properly

thank u so much.. its working now..