Convert Text to DateandTime

Did you try the todatetime() function?

https://docs.appian.com/suite/help/24.4/fnc_conversion_todatetime.html

Here are more functions in Appian: https://docs.appian.com/suite/help/24.4/Appian_Functions.html

Not able to get the desired output if i use only todatetime(). I think need to use more functions to get the exact value i am specifying.

Not able to get the desired output if i use only todatetime(). I think need to use more functions to get the exact value i am specifying.

What is the desired output? Are you missing the seconds?

Getting below error when used todatetime()

Expression evaluation error at function a!forEach [line 6]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function 'todatetime' [line 19]: Could not cast from Time to Date and Time with Timezone. Details: CastInvalidCould not cast from Time to Date and Time with Timezone. Details: CastInvalid

OK. What is the original data type? When trying to convert a string, this works great for me.

Output of the report data is being used to generate this text which needs to be converted into datetime.

Text is generated like 

 index(split(fv!item.c0, "_"), 3, null)

output: "01/07/2025 12:00:35 PM"

todatetime( index(split(fv!item.c0, "_"), 3, null))

ERROR:

Expression evaluation error at function a!forEach [line 6]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function 'todatetime' [line 19]: Could not cast from Time to Date and Time with Timezone. Details: CastInvalidCould not cast from Time to Date and Time with Timezone. Details: CastInvalid

The split() function returns a list of strings. Not sure where that Time datatype comes from? Can you share more of your code? Ideally a fully working isolated test case?

a!localVariables(
  local!reportdata: {{c3: fn!datetime(2025, 1, 7, 5, 12, 2, 300), c0: "Workflow_00001_01/07/2025 12:00:35 PM", c1: 1, c2: "Process", dp1: null, dp0: 1055133, dp3: null, dp2: null}, {c3: fn!datetime(2025, 1, 3, 5, 20, 6, 410), c0: "Workflow_0001_01/03/2025 06:09:35 AM", c1: 1, c2: "Process", dp1: null, dp0: 1060892, dp3: null, dp2: null}, {c3: fn!datetime(2025, 1, 2, 12, 40, 13, 960), c0: "Workflow_0001_12/07/2022 06:09:35 AM", c1: 0, c2: "Process", dp1: null, dp0: 1060315, dp3: null, dp2: null}},
  a!forEach(
    items: local!reportdata,
    expression: if(a!isNotNullOrEmpty(fv!item), {
      taskName: fv!item.c2,
      Id: if(
        a!isNotNullOrEmpty(fv!item.c0),
        if(
          left(fv!item.c0, 3) = "PN",
          index(split(fv!item.c0, "_"), 3, null),
          index(split(fv!item.c0, "_"), 2, null)
        ),
        null
      ),
      SubDateTime: index(split(fv!item.c0, "_"), 3, null)
    }, null)
  )
)

Add the todatetime() function in line 16 it is working for me not returning any error.. 

a!localVariables(
  local!reportdata: local!reportdata: {{c3: fn!datetime(2025, 1, 7, 5, 12, 2, 300), c0: "Workflow_00001_01-07-2025 12:00:35 PM", c1: 1, c2: "Process", dp1: null, dp0: 1055133, dp3: null, dp2: null}, {c3: fn!datetime(2025, 1, 3, 5, 20, 6, 410), c0: "Workflow_0001_01-03-2025 06:09:35 AM", c1: 1, c2: "Process", dp1: null, dp0: 1060892, dp3: null, dp2: null}, {c3: fn!datetime(2025, 1, 2, 12, 40, 13, 960), c0: "Workflow_0001_12-07-2022 06:09:35 AM", c1: 0, c2: "Process", dp1: null, dp0: 1060315, dp3: null, dp2: null}},
  a!forEach(
    items: local!reportdata,
    expression: if(a!isNotNullOrEmpty(fv!item), {
      taskName: fv!item.c2,
      Id: if(
        a!isNotNullOrEmpty(fv!item.c0),
        if(
          left(fv!item.c0, 3) = "PN",
          index(split(fv!item.c0, "_"), 3, null),
          index(split(fv!item.c0, "_"), 2, null)
        ),
        null
      ),
      SubDateTime: a!localVariables(
        local!date:split(fv!item.c0,"_"),
        todatetime(substitute(index(local!date,3,null),"-","/"))
      )
    }, null)
  )
)

Its erroring for me

If possible can you post the screenshot with the error