Error:Cannot determine signal type

[pidiln]

While compiling an existing running Lookout process I get the error message 'cannot determine signal type'. I get more that two hundred errors which stops the compilation process. I have done this on another lookout process file with no errors. Most of the errors appear to be occurring in Expression objects. I use very few expression objects in the Lookout files that do compile. What gives?

[Ryan.S]

What's the version of lookout where you created the process? And what's the current version?

You cannot develop in higher version and open it in lower version.

[pidiln]

Thanks for the response Ryan,

I have found my soulution.

I am running 3.8.16. I know its old ... but it works well for what we are doing.

I have been attempting to convert using the Siemens ti505 object Driver (H1) to the Tiway driver so that we could upgrade to using the tcpip comomunication to our Siemens 555/545 PLC's.  I was haveing tremendous issues getting the compiler to run as it would stop at 200 errors. I thought I remembered something about having all the PLC Object names at the top of the list alphebetically. I changed the Plc names by adding 'a1' in front of the name of each Plc object, which did bring the to the objects to the very top to the object list. I then ran another complilation and presto. The compilation went off with only a few minor errors which were quickly resolved. I then editied the PLC objec types in notepad (from Siemens TI505 object to Tiway object). Then I compilied again and the changes took place in the process filewhen I open it to run in Lookout. I have yet to do a full blown test, installl the new TCP/IP Cards in the PLC's connect cables, make slight programing changes in the Plc's logic and setup. I will give you and update once I do that.