Hello Everyone,
I am new to Dynamo, I have an issue with indexof node which is returning -1.
When I connect list from list create is working fine but when I connect my list from element it shows -1.
Anyone knows what’s the issue?
Some thoughts
Is it a lacing issue. Set node to longest lacing.
Is one input a number and the other a string i.e. not the same.
Are there trailing white spaces?
Have you tried flattening both input lists?
Are you absolutely sure the items are contained in the list?
-1 means can not find that item. So there must be a mismatch.
Maybe also try uploading example script and Revit file for others to help later.
Edit: I would guess the output from the get parameter value node is a list of strings not numbers. You can convert them to number using a node I think
I tried both lacing and string to number and object but the result is the same -1
I flat, Transpose 
everything ! nothing happen
My guess: you’re comparing strings to integers or other mismatching data type. Check the data type for both sets of data with an Object.Type node.
1 Like
Hi @jacob.small,
you are right the type is different. but I tried to make both of them string but I was not successful.
if the type is different what should I do then?
Also, I found the node in clockwork package versionnumber.tointeger and make the type same as list but still did not work
