Fixing Run-Time error ‘6’ Overflow when using Excel twsdde.xls to send orders to IB

Twsdde.xls (the sample excel file provided by Interactive Brokers) contains a procedure that creates order ID’s using a calculation based on the current date and time. The variable “ongoingID” is defined as type Long. On 8/26/2012 the calculation began producing a value higher than the maximum value for a Long in Excel which is 2147483647 [wiki].

To solve this error I currently recommend the following steps:

From TWS (Trader Workstation) menu:

  1. Navigate “edit”>global configuration>API
  2. Press the “Reset Order ID and ID sequence” button


In any workbook that you use such as Twsdde.xls or any custom Excel/VBA workbook used to send orders to IB:

  1. Open the workbook and press Alt+F11 to open the vba editor
  2. Press CTRL+F (or use menu) to open the Find (search) box. Search for and change “Const orderMult = 1000000” to “Const orderMult = 100000” (one less zero)



Now you should once again be able to successfully send order to IB via Excel.





  1. Cool thanks, that's really useful and solved my problem!

    Can you explain what the constant is? And can we be sure that it is a clean fix?

  2. Great! Solved my problem!

Speak Your Mind