While trying to release a Production order, I encountered an error,
Error: Working time has not been specified for xx/xx/xxxx when releasing production order
Solution: You need to define the working time for working time calendar. Follow below steps.
Step I: Go to Organisation administration > Setup> Calendar > Calendars
Step II: Select a calendar and click on Working time on action pan.
Step III: Click on compose working time, and select appropriate values
Step IV: Once done, click on OK button, you will get default working time created for the calendar.