@dzien50
I really think, that your problem is the same I had. Even if we are using different versions of the program.
Let me try to explain myself a little better. If the problem you meet with your industry assets like Multi Industry New or the industry enabled wagons is the same that I had, than the cause is a faulty asset. Maybe you recently downloaded additional product .cdps and one is defective. When opening the product list to edit the parameters of the wagons or the industry, the program lists all installed allowed product assets. If any one of the assets you have installed in this category is faulty, the whole list will stay empty and you get the error you described.
I will try to give you a step by step guide how to find the faulty asset. But mind, I am using TS2009 which has changed some of the terms. My TRS2006 is the german version which doesn't help us with the correct terms either. Nevertheless you should be able to follow my guide. If not, just ask again.
First you have to start the content manager. After opening it you must define a search in the activity panel on the left. Choose "Category" from the left dropdown menu and the term "Commodity" from the right. Maybe the term is "Products" in TRS2006. Afterwards add a second search phrase by clicking on the plus sign. The second search parameter should be "Location", "Local". This will give you a list of your installed products. Now add the third search parameter "Faulty".
When you don't get any assets listed now, then this is not the cause of your problem and I don't know how to help you. But I would expect, that you will find one or more assets by this search that have a fault.
If you are able to edit them, you might give it a try. If not, you should just delete them. When there are no faulty product assets left in your installation, your Multi Industry should work again as before.
I really think, that your problem is the same I had. Even if we are using different versions of the program.
Let me try to explain myself a little better. If the problem you meet with your industry assets like Multi Industry New or the industry enabled wagons is the same that I had, than the cause is a faulty asset. Maybe you recently downloaded additional product .cdps and one is defective. When opening the product list to edit the parameters of the wagons or the industry, the program lists all installed allowed product assets. If any one of the assets you have installed in this category is faulty, the whole list will stay empty and you get the error you described.
I will try to give you a step by step guide how to find the faulty asset. But mind, I am using TS2009 which has changed some of the terms. My TRS2006 is the german version which doesn't help us with the correct terms either. Nevertheless you should be able to follow my guide. If not, just ask again.
First you have to start the content manager. After opening it you must define a search in the activity panel on the left. Choose "Category" from the left dropdown menu and the term "Commodity" from the right. Maybe the term is "Products" in TRS2006. Afterwards add a second search phrase by clicking on the plus sign. The second search parameter should be "Location", "Local". This will give you a list of your installed products. Now add the third search parameter "Faulty".
When you don't get any assets listed now, then this is not the cause of your problem and I don't know how to help you. But I would expect, that you will find one or more assets by this search that have a fault.
If you are able to edit them, you might give it a try. If not, you should just delete them. When there are no faulty product assets left in your installation, your Multi Industry should work again as before.