Problem with timeStamp

Hello all,
I’m getting a “TypeError: Unable to convert row 22, column 2 to type class java.sql.Timestamp”
and I don’t know how to solve this.

I am trying to create a dataset with multiple row on the project script to populate a table on perspective.

Status = system.dataset.toDataSet(headers, data)
return Status

If I return the “data” and do the “system.dataset.toDataSet” from a button script all is fine but I want the function to return this dataset.

After some test I sorted out that on the error is caused by this row:
Dati: row 22 - 2021-03-10 11:46:54.074 - Wed Mar 10 14:29:57 CET 2021

all the other row are like this:
Dati: row 21 - 2021-03-10 11:46:53.144 - 2021-03-10 11:46:54.074

On the last row I force the second timestamp to

if I do the same on the script console all is fine

some ideas?

Can you post your actual code?
It looks like you’re creating/modifying a dataset with a column that’s a java class (Timestamp), but trying to insert some other type of value (a string?) into it instead.

Sure, my goal is to estract from a “system.tag.queryTagHistory” a dataset like this:

startTS, stopTS, value, duration

this is the script:

def calc(startTime,endTime,Paths):

	#endTime =
	#startTime =, -12)

	hist=system.tag.queryTagHistory(paths, startDate=startTime, endDate=endTime, returnSize=-1, returnFormat='Wide')

	headers = ["Status", "Start", "End", "Duration"]
	data = []		
	system.util.getLogger("Dataset").info("Dati:"+ str(startTime)+ " - " +str(endTime)+ " - " +str(tagPaths) + " - ")
	for row in range(hist.getRowCount()):
		eventStart = hist.getValueAt(row, 0)
		if row < (hist.getRowCount()-1):
			eventStop=hist.getValueAt(row+1, 0)

		system.util.getLogger("Dataset").info("Dati:"+ str(row)+ " - " +str(eventStart)+ " - " +str(type(eventStop)) + " - ")

		Duration = (eventStop.time - eventStart.time)/1000
		Value=hist.getValueAt(row, 1)
		data.append([Value, eventStart, eventStop, Duration])

	Stati = system.dataset.toDataSet(headers, data)
	return Stati

The way I’m calling is:


	table = self.getSibling("Table_0")
	newData = SM_Report_try.calc(startTime,endTime,tagPaths) = newData

Thanks in advance,
also if you think there is a better way to do that I’m fully open


Well, I don’t see anything obviously wrong with your code. Try logging the type() of your eventStart and eventStop values as you go through the loop? Something that’s not able to be coerced to a timestamp is slipping in there.

Yes the type looks different.
the one I’m getting from the query is java.sql.Timestamp
the one from is

row 22 - 2021-03-10 11:46:54.074 - Wed Mar 10 14:29:57 CET 2021

The calculation works but I’m not able to insert into a dataset.
are any way to cast the type?


import java.sql.Timestamp as Timestamp

now =
print now
print type(now)
print ' '
t = Timestamp(now.getTime())
print t
print type(t)


Thu Mar 11 13:01:01 EST 2021
<type 'java.util.Date'>
2021-03-11 13:01:01.618
<type 'java.sql.Timestamp'>

Another option - use the DatasetBuilder class to explicitly state what type(s) to use for your columns. Timestamp is a subclass of java.util.Date, so Java can coerce in one direction but not the other.


I’m trying to follow this way but following the example give me no result.

import com.inductiveautomation.ignition.common.util.DatasetBuilder as DatasetBuilder

myDataset = DatasetBuilder.newBuilder()

myDataset.colNames(“SeriesName”, “FillColor”, “StrokeColor”, “StrokeWidth”)
myDataset.colTypes(String.class, Color.class, Color.class, Float.class)
myDataset.addRow(“Process Value”, TypeUtilities.toColor("#B8DAFF33"), Color.BLUE, 0.1)
myDataset.addRow(“Setpoint Value”, TypeUtilities.toColor("#FFFFFF44"), Color.DARK_GRAY, 0.2);

This give me: NameError: name ‘String’ is not defined

Also where I can find the class definition I can use?

Thanks in advance

I converted as jordan suggested

actually I’m facing a stange behaviour,now the code is executing.

If I look at the dataset when I’m using perspective i get all field formatted as java.sql.Timestamp

If I use the script console I got the problem:

This looks very strange

Then I’m not certain what causing your original issue, as all of those returned are java.util.Date, except for the one we coerced at the end.

Is it possibile to use a transaction group to achieve this type of setup?

[…some variable…,start_Timestamp,stop_Timestamp,Duration]

Thanks in advance