Working with project variables in Testcomplete

Actually, I think I might know what's going on with your delete script.

Every time you delete a variable, the indexes change.  So, let's say you have the following three variables.

Project.Variables.Var1 -> Index 0

Project.Variables.Var2 -> Index 1

Project.Variables.Var3 -> Index 2

Now your script runs and you delete the first one (index 0).  The collection now looks like this.

Project.Variables.Var2 -> Index 0

Project.Variables.Var3 -> Index 1

The next time through the loop, you delete Index 1.  So, now the collection looks like this.

Project.Variables.Var3 -> Index 0

Now your automation is going to try to delete Index 2.... and you'll most likely get an error like "Variable not found" or "Index out of range" or something like that because now there is no variable with index value of 2.

If you're going to do a loop like that, you should do it as a for loop that counts DOWN instead of counting up.  Here's what it would look like in JavaScript... I'm assuming you're using Python so you'll have to adapt.

varcount = Project.Variables.VariableCount
for (i = varcount; i >= 0; i--){
  if Project.Variables.VariableExists(Project.Variables.GetVariableName(i)){
    Project.Variables.RemoveVariable(Project.Variables.GetVariableName(i))
}

See if that helps.