Scheduled Process Model

Could you try this,
Use Delay until the date and time specified by this expression with this expression:

datetime(
  year(now()),
  month(now()),
  day(now()),
  hour(now()),
  if(minute(now())<15, 15, if(minute(now())<45, 45, 15)),
  0
) + if(minute(now())>=45, 1, 0) * 60

Hi Shubham Aware 

I added a similar code in delay until the date and time specified.

The logic is same but format of code is different, refer below code. But with my code the process mode is erroring out and getting error mail as attached below. Any idea why it is erroring out? Is it due to using localvariables? Are localvariables not allowed in timer event? Is there any documentation with respect to that?

= a!localVariables(
  local!now: now(),
  local!currentMinute: minute(local!now),
  local!upcomingMinute: if(
    and(
      local!currentMinute >= 15,
      local!currentMinute < 45
    ),
    45,
    15
  ),
  local!upcomingHour: if(
    local!currentMinute >= 45,
    a!addDateTime(startDateTime: local!now, hours: 1),
    local!now
  ),
  datetime(
    year(local!upcomingHour),
    month(local!upcomingHour),
    day(local!upcomingHour),
    hour(local!upcomingHour),
    local!upcomingMinute
  )
)

Error:

Hi Shubham Aware 

I added a similar code in delay until the date and time specified.

The logic is same but format of code is different, refer below code. But with my code the process mode is erroring out and getting error mail as attached below. Any idea why it is erroring out? Is it due to using localvariables? Are localvariables not allowed in timer event? Is there any documentation with respect to that?

= a!localVariables(
  local!now: now(),
  local!currentMinute: minute(local!now),
  local!upcomingMinute: if(
    and(
      local!currentMinute >= 15,
      local!currentMinute < 45
    ),
    45,
    15
  ),
  local!upcomingHour: if(
    local!currentMinute >= 45,
    a!addDateTime(startDateTime: local!now, hours: 1),
    local!now
  ),
  datetime(
    year(local!upcomingHour),
    month(local!upcomingHour),
    day(local!upcomingHour),
    hour(local!upcomingHour),
    local!upcomingMinute
  )
)

Error:

The Assignment invalid issue seems to be caused by using a!localVariables().
Can you use code I shared into a direct expression without local variables?

I tried you code but in you code adding 60 at the end is not adding 60minutes it is adding 60 days, so I modified the code as follows

= a!addDateTime(
  startDateTime: datetime(
    year(now()),
    month(now()),
    day(now()),
    hour(now()),
    if(
      and(minute(now()) >= 15, minute(now()) < 45),
      45,
      15
    ),
    0
  ),
  hours: if(minute(now()) >= 45, 1, 0)
)

But this logic also resulted in same error, may be along with localvariables, a!addDateTime function also not supported.

Now I added the below logic and it working fine. Thanks for your inputs Shubham Aware ,Stefan Helzle . Is there any documentation on these things, what are supported and what are not supported in timer properties? If avaialble can you please share the same

= datetime(
  year(now()),
  month(now()),
  day(now()),
  hour(now()),
  if(
    and(minute(now()) >= 15, minute(now()) < 45),
    45,
    15
  ),
  0
) + intervalds(if(minute(now()) >= 45, 1, 0), 0, 0)

Good to see it's working after removal of localVariable() and modifying my earlier code.