Maximo formula that uses a custom formula function/automation script?

问题

In Maximo 7.6.1.1:

I would like to create an attribute formula that uses a custom formula function/automation script.

I've tried doing it with the steps below, but unfortunately, I get an error when I try to use it in WO Tracking:

BMXAA3761E - The event has failed. Ensure that the event is registered correctly.
See the log file in the APP HOME directory for more details about the error.
null

Steps:

Create an automation script:
Add/Modify Formula Function:
Add/Modify Formula For Attribute:
Create a WO. Save it so that the attribute formula is invoked.
Error:

From the SystemOut log:

Caused by: 
java.lang.NullPointerException
    at com.ibm.tivoli.maximo.expression.FormulaMboEventListener.preSaveEventAction(FormulaMboEventListener.java:213)
    at psdi.server.event.EventTopic$Subscription.preSaveEventAction(EventTopic.java:731)
    at psdi.server.event.EventTopic.preSaveEventAction(EventTopic.java:342)

Does anyone know why I'm getting this error?

Related question here: Can Maximo formulas return null?

回答1:

Not sure what problem are you trying to solve. If you're just trying to play around with formula, I don't have much experience with it, but from what I understand, it can only return a number. So returning null is not possible. (Although there is a SETVALUENULL function which can be used to set a different field to null, but the function itself returns 0 and 1).

If the purpose is to return the X, Y coordinate value to Work Order from Asset/Location/Service Address, and setting it to null when there is no value, how about we still using standard formula and let it returns a 0 when everything is null. Then, we create a separate attribute launchpoint script on "validate" event of the ERI attribute, check to see if the value is 0, then we will overwrite it with a null using this code:

    if mbo.getDouble("eri") == 0:
      mbo.setValueNull("eri")

回答2:

From what I see, this preSaveEventAction method is not expecting a null value and voluntarily crashes. Look at the com.ibm.tivoli.maximo.expression.Expression.eval() method from the Javadoc. It is returning a BigDecimal, a clue that a formula should return a number.

https://developer.ibm.com/static/site-id/155/maximodev/7609/maximocore/businessobjects/

So the reason you're getting this error seems to be because your script returns an invalid value, same as here: Can Maximo formulas return null?

来源：https://stackoverflow.com/questions/59888911/maximo-formula-that-uses-a-custom-formula-function-automation-script

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formula

maximo