#ERROR columns when ALL materials selected

Dear All,

I have a report with 42000 materials and about 100 columns the report (BEx query) runs fine when a few materials selected but it fails with #ERROR in few columns such as a variable 'Pallet net weight' with below formula:

=If([Material].[Material - Weight unit (Key)]="G";

Round((ToNumber([Material].[Material - Net Weight (Key)]))*[Units Per Cases]*ToNumber([Material].[Material - Cases per Pallet (Key)])/453.592;3);

Round((ToNumber([Material].[Material - Net Weight (Key)]))*[Units Per Cases]*ToNumber([Material].[Material - Cases per Pallet (Key)]);3))

here [Material - Net Weight (Key)] and [Material - Cases per Pallet (Key)] are Material attributes as in the image

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I am a little confused why it shows values for few materials (ex: 150 materials), as below

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All materials selected and see the error.

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Please provide any inputs

Thanks in advance,

Kris