If does not work

[#1]

Hello, I have a chart in  expression I put the following code:

if (

   IsNull (Customer)

   (((sum ({<Service = {'Type 1'}>} COST) / sum ({<Service = {'Type 1'}>} [Qty Equiv])) +

   (sum ({<Service = {'Type 2'}>} COST) / sum ({<Service = {'Type 2'}>} [Qty Equiv])) +

   )

      - 10903) / 10903,

      (((sum ({<Service = {'Type 1'}>} COST) / sum ({<Service = {'Type 1'}>} [Qty Equiv])) +

   (sum ({<Service = {'Type 2'}>} COST) / sum ({<Service = {'Type 2'}>} [Qty Equiv])) +

   )

      - Sum (Proposal)) / sum (Proposal)

   )

Customer is selected by a LIST object

If the client is empty it should return the value of the first expression, so far so good.

After I select a customer theoretically he should execute the second expression, data changes, but does not return the correct value.

They could help me with this error? thank you

[Gysbert_Wassenaar]

I'm pretty sure the expression you posted does not work at all. It's syntax is not correct.

This is not a condition that can be evaluated:

  IsNull (Customer)(((sum ({<Service = {'Type 1'}>} COST) / sum ({<Service = {'Type 1'}>} [Qty Equiv])) +

   (sum ({<Service = {'Type 2'}>} COST) / sum ({<Service = {'Type 2'}>} [Qty Equiv])) +  )- 10903) / 10903