Hello thanks for checking this out. I found the cause & fix, it happened due to the size of the .os file & the way components are dragged & placed in automation. If you have any different theory on this issue please let me know. There are two major points we need to note while developing: 1. Keep an eye on the .os file size & its behavior, if you observe any slowness while developing use different automation for further development. After every major change(if you added at least 150 blocks) try closing the automation/Solution file & open it again, then only you can observe the slowness. 2. And there is one more size attribute you need to look at, which is inside the .os file. Edit the automation file with notepad or notepad++, then under the "Automation Document" node you can find the size node. make sure value of X,Y is not greater than 20000,20000. If this this greater than suggested value, that means you have placed a block far down or right in automation. Please refer below snippet from os file. By mistake if it is already more than suggested value, you are more likely to have this issue. So you need to modify all the Top, Left, X, Y Values of all connection blocks in that file or re-develop the code. Snippet:  <Component Version="1.0">     <OpenSpan.Automation.Automator Name="Autx_P_PrepareFTPFiles" Id="Automator-8DBF6A480217839">       <AutomationDocument>         <Name Value="" />         <Size Value="21156, 20000" />         <Objects>           <ConnectionBlock> Note: You might lost some data(can't give guarantee on this solution), you can recover at least 90-100% of it. Technically it should work & it worked for me. Ultimate Solution: Create automation with less blocks/size. So you can avoid the above error. Thank you.