Problem with updating pi point. Update_mode and buffer_mode

[HendrikReitsma]

The following code gave me a type error:

with PI.PIServer(server='foo') as server: point = server.search('foo')[0] # the tag has to be created point.update_value( 1.0, datetime.now(), UpdateMode.NO_REPLACE, BufferMode.BUFFER_IF_POSSIBLE, )

The error:

` 279 def _update_value(self, value, update_mode, buffer_mode):
--> 280 return self.pi_point.UpdateValue(value, update_mode, buffer_mode)

TypeError: No method matches given arguments for PIPoint.UpdateValue: (<class 'OSIsoft.AF.Asset.AFValue'>, <class 'int'>, <class 'int'>)`

It seems that the update_value method receives the wrong type of update_mode and buffer_mode even though I used the default values. They are specifically expected to be enums instead of integers.

To ensure the values are enums I added the following two lines to the update_value method in PIData.py:

update_mode = AF.Data.AFUpdateOption(int(update_mode)) buffer_mode = AF.Data.AFBufferOption(int(buffer_mode))

Resulting in:

`
def update_value(
self,
value,
time=None,
update_mode=UpdateMode.NO_REPLACE,
buffer_mode=BufferMode.BUFFER_IF_POSSIBLE,
):
"""Update value for existing PI object.

    Args:
        value: value type should be in cohesion with PI object or
            it will raise PIException: [-10702] STATE Not Found
        time (datetime, optional): it is not possible to set future value,
            it raises PIException: [-11046] Target Date in Future.

    You can combine update_mode and time to change already stored value.
    """
    if time:
        time = to_af_time(time)
    update_mode = AF.Data.AFUpdateOption(int(update_mode))
    buffer_mode = AF.Data.AFBufferOption(int(buffer_mode))
    value = AF.Asset.AFValue(value, time)
    return self._update_value(value, update_mode, buffer_mode)

`

That seems to have fixed it and I don't get any more problems.

Does anybody have any idea why this problem was occuring for me?

[Hugovdberg]

Are you sure you are using the latest version of PIconnect? This should be fixed with version 0.10, and as you mention line numbers 279/280 for _update_value I think you are on version 0.9.1. It was a problem with pythonnet version 3.0 that no longer allowed implicit conversion from int to enum. Updating PIconnect to 0.10.4 should be the safest bet that you don't get these errors anymore.

[HendrikReitsma]

Thanks. Updating PIconnect to 0.10.4 solved the issue.