DateTime Input and Project Library script error

Ignition
,
1

If I call my project library script def shiftGenerator(startDate, shiftPattern): from the Script Console like this,

	startDate = system.date.addDays(system.date.now(), -1)	# Yesterday for testing.
	shiftPattern = [ ... ]
	shiftCalcs.shiftCalcs.shiftGenerator(startDate, shiftPattern)

it works.

When I call it from an Expression Binding like this,

runScript(
	"shiftCalcs.shiftCalcs.shiftGenerator", 
	2000,	// 2 second update for testing. 
	{session.custom.datePicker},
	{view.params.config.shiftPattern} 
)

The problem seems to be caused by whatever format the datePicker session variable is stored in. datePicker is generated by a DateTime Input component which has a simple (bidirectional) property binding from it’s props.value to the session custom property session.custom.datePicker.

It seems to choke with an Error_ExpressionEval error when startDate is passed to this function:

def addShiftStartTime(timestamp, time_str, nextDay):
	# First shift usually starts at 7 a.m. or 8 a.m.
	# timestamp is midnight of the calendar start day.
	# time_str is the shift start in "hh:mm" format.
	# nextDay signals if the start of the third shift is after midnight.
	h, m = time_str.split(':')
	newDate = system.date.addHours(timestamp, int(h))	# Add on the hours,
	newDate = system.date.addMinutes(newDate, int(m))	# and the minutes,
	if nextDay:											
		newDate = system.date.addDays(newDate, 1)		# and another 24 hours.
	return newDate

Can anyone suggest some debug procedures?

2

Some progress. Changing
d = system.date.midnight(system.date.toMillis(startDate))
to
d = system.date.midnight(startDate)
in my function seems to work for both the Script Console and the Expression Binding.