[Expression.Error] We cannot convert the value null to type Logical.

[fzhang]

Hi all, 

In my query, the following step is causing the error: [Expression.Error] We cannot convert the value null to type Logical.

here's M code

Table.FromRecords(Table.TransformRows(#"Expanded AccountXRef", (Row) => if Row[Charge To Home BU] then Record.TransformFields(Row, {
{"Charge To BU Number", each Row[Home BU Number]},
{"Charge To BU Name", each Row[Home BU Name]},
{"Charge To BU Type", each Row[Home BU Type]},
{"Charge To Division", each Row[Home Division]},
{"Charge To HRBP", each Row[Home HRBP]},
{"Charge To Director/Manager", each Row[#"Home Director/Manager"]},
{"Charge To Officer", each Row[Home Officer]},
{"Charge To EC Member", each Row[Home EC Member]}
}) else Row), Value.Type(#"Expanded AccountXRef"))

I have checked all the columns on the table and don't see any nulls. Can someone see what the issue is?

Thanks!

[v-stephen-msft]

Hi @fzhang ,

Could you tell me if your problem has been solved?

Both @Vijay_A_Verma  and @AlexisOlson 's suggestions are good.

If you are still confused about it, please provide me with more details about your problem. For example, provide some screenshots.

Best Regards,

Stephen Tao

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Vijay_A_Verma]

This part needs to be made conditional

if Row[Charge To Home BU]

This needs a conditional operator say

if Row[Charge To Home BU] <> null 

[AlexisOlson]

There's a nifty null coalesce operator ?? now. This allows for handling null checks compactly.

if Row[Charge To Home BU] ?? false then ...

This is a shortcut for

if (if Row[Charge To Home BU] = null then false else Row[Charge To Home BU]) then ...

The operator is documented here (scroll all the way down to the end):
https://docs.microsoft.com/en-us/powerquery-m/m-spec-operators