Your text string from Read File is empty. You should internalise it before posting, because your excel data only exist on your machine. Regarding “internalise data” you should refer to No.3 of the linked topic.
Without further investigating your definition, I’d like to point out two things.
1st. Probably your surfaces from Surface Split are “Trimmed” surfaces. therefore Evalute Surface with reparameterized won’t work. Try to use Area instead.
2nd. Looks like(According to your screen capture) you are trying to replace your trimmed surfaces with your strings from the excel data, and finally trying to “Evalute” them. Why?
You can’t evalute some sort of string with Evalute Surface.