In one of the case getting Cannot load from object array because “.ag” is null
stacktrace
com.aspose.cells.bh.b(Unknown Source),
com.aspose.cells.kp.a(Unknown Source),
com.aspose.cells.kw.g(Unknown Source),
com.aspose.cells.ml.a(Unknown Source),
com.aspose.cells.ku.b(Unknown Source),
com.aspose.cells.ku.a(Unknown Source),
com.aspose.cells.Chart.a(Unknown Source),
com.aspose.cells.Chart.calculate(Unknown Source)
I don’t have sample code to reproduce the scenario as of now but could you check what be wrong with Chart object that we are getting this exception calculate()?
Using 24.6 aspose cells version