Which objects are you using?

Which fields are you setting?

Are you sure the message is an error and not a warning (you need to check the actual returned value of the methods like SetKey and Write to determine this)?

@David Speck. i am trying to create an order. My code is as shown below

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace SkynamoSage100Integration

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Attempting login and create session");

            using (DispatchObject pvx = new DispatchObject("ProvideX.Script"))

            {

                pvx.InvokeMethod("Init", @"C:\Sage\Sage 100 Advanced\MAS90\Home");

                using (DispatchObject oSS = new DispatchObject(pvx.InvokeMethod("NewObject", "SY_Session")))

                {

                    oSS.InvokeMethod("nSetUser", "test", "test");

                    oSS.InvokeMethod("nSetCompany", "ABC");

                    oSS.InvokeMethod("nLogon");

                    oSS.InvokeMethod("nSetModule", "S/O");

                    oSS.InvokeMethod("nSetDate", "S/O", "02252021");

                    Console.WriteLine("session created and login was successful!!");

                    int TaskID = (int)oSS.InvokeMethod("nLookupTask", "SO_SalesOrder_ui");

                    oSS.InvokeMethod("nSetProgram", TaskID);

                    using (DispatchObject ordeR = new DispatchObject(pvx.InvokeMethod("NewObject", "SO_SalesOrder_bus", oSS.GetObject())))

                    {

                        //string strSalesOrderNo = "";

                        //object[] getNextOrd = new object[] { strSalesOrderNo };

                        //ordeR.InvokeMethodByRef("nGetNextSalesOrderNo", getNextOrd);

                        //Console.WriteLine(getNextOrd);

                        //Console.ReadKey();

                        //ordeR.InvokeMethod("nSetKey", getNextOrd.ToString());

                        string error1 = (string)ordeR.GetProperty("sLastErrorMsg");

                        ordeR.InvokeMethod("nSetValue", "SalesOrderNo$", "0000300");

                        ordeR.InvokeMethod("nSetValue", "ARDivisionNo$", "02");                         

                        ordeR.InvokeMethod("nSetValue", "CustomerNo$", "JELLCO");

                        string error2 = (string)ordeR.GetProperty("sLastErrorMsg");

                        //string error3 = (string)ordeR.GetProperty("sLastErrorMsg");

                        ordeR.InvokeMethod("nSetValue", "PrintSalesOrders$", "N");

                        ordeR.InvokeMethod("nSetValue", "PrintPickingSheets$", "N");

                        ordeR.InvokeMethod("nSetValue", "TermsCode$", "02");

                        using (DispatchObject soLine = new DispatchObject(ordeR.GetProperty("oLines")))

                        {

                            soLine.InvokeMethod("nAddLine");

                            soLine.InvokeMethod("nSetValue", "ItemCode$", "HON 2 DRAWER FLE W/ LCK");

                            soLine.InvokeMethod("nSetValue", "QuantityOrdered", "10");

                            soLine.InvokeMethod("nWrite");

                            string error4 = (string)ordeR.GetProperty("sLastErrorMsg");

                            ordeR.InvokeMethod("nWrite");

                            Console.WriteLine("order could not be added due to error\n" + error1 + "\n" + error2 + "\n" + error4);

                            Console.ReadKey();

                        }

                    }

                }

            }  

        }

    }

}

You are using SetValue for the SalesOrderNo$ field.  All single field keys should use SetKey to put the record in an editable state.  For multi-part keys, you should use SetKeyValue for each field followed by a SetKey without any arguments.

Also, your Logon method is not needed if you are using SetUser.

Date fields are in the YYYYMMDD format, you are setting the date in the SetDate mehtod using what appears to be in the MMDDYYYY format.

Hi David Speck. Please may you kindly give examples of what you mean here, I am not sure I understand what you mean

Here I mean examples of the setKey and SetValue use cases

If you haven't already, familiarize yourself with Sage 100 File Layouts and Object Reference - Sage 100 File Layouts and Object Reference.

Use it to review tables and their keys and indexes.

When a table's primary index's key is only comprised of one field, you can use the SetKey method and pass it the key you are trying to edit.  However, if it is comprised of more than one field, you have two options, either pad all fields to their max length with a null character (ASCII # 0) with the exception of the last field that makes up the key when passing it to the or use the SetKeyValue method for each field that makes up the key, you then follow this with the SetKey method without an argument.  The first argument for SetKeyValue is the field, much like SetValue, the second argument is the value.

The following is an example of a single field key like SO_SalesOrderHeader
nRetVal = 0 : nRetVal = oBusObj.SetKey("1234567")

The following is an example of a multi field key like AR_Customer
oBusObj.SetKeyValue "ARDivisionNo$", "00"
oBusObj.SetKeyValue "CustomerNo$", "1234567"
nRetVal = 0 : nRetVal = oBusObj.SetKey()

David,

I'm experiencing similar issue as the original poster 

retVal = oSOOrder.oLines.nAddLine()
retVal = oSOOrder.oLines.nSetValue("ItemCode$", "44241")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting SKU: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("ItemType$", "1")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Description: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("WarehouseCode$", "WEB")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Warehouse Code on Item: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("UnitOfMeasure$", "EACH")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Unit Of Measure: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("TaxClass$", "NT")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Tax Class: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("DropShip$", "N")

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Drop Ship: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("QuantityOrdered", 5.00000)

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Quantity On Order: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("QuantityShipped", 0)

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Quantity Shipped: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("UnitPrice", 2.14000)

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error Setting Unit Price: " + msgVal
WScript.Echo(errCode & errMsg)

oSS.nCleanup()
oSS.DropObject()
Set oss = Nothing
Set oScript = Nothing

WScript.Quit
End If

retVal = oSOOrder.oLines.nSetValue("Discount$", "Y")
retVal = oSOOrder.oLines.nWrite()

If retVal = 0 Then

msgVal = oSOOrder.sLastErrorMsg
errCode = 0
errMsg = errMsg & "|Error writing order entry " + msgVal
WScript.Echo(errCode & errMsg)

It got caught on the last error when writing the sales order saying it's missing record to calculate taxes.

You can't write to Lines without first using a successful SetKey on the header object, which should be oSOOrder based on your code sample.