empty variable

[#1]

How do I check in the load script if a variable is empty?

if isnull($(S)) then

.....

Doesn't work.

[Miguel_Angel_Baeyens]

Hello,

Try

If (Len($(vVar)) = 0) Then

[#3]

still doesn't work.

This is the error I get:

Error in expression:
Len takes 1 parameter If (Len() = 0) Then

[#4 · Accepted solution]

Hi,

The sentence is:

If IsNull(S) then

You can debug my attached file and verify the sentence.

Best regards.