Destination postal code and product dimensions

Hi

I have two issues (by now) integrating Fefex Woocommerce plugin into our webshop.

1st. It’s true that Fedex plugin cannot deal with dimensions that include decimals? Do i need to change all my product dimensions?
—————————————————————————–
FedEx RESPONSE: Reveal
stdClass Object
(
[faultcode] => SOAP-ENV:Server
[faultstring] => stdClass Object
(
[!xml:lang] => en
[!] => Fault
)

[detail] => stdClass Object
(
[cause] => UnrecoverableClientError
[code] => SchemaError
[desc] => validation failure for RateRequest Error:cvc-datatype-valid.1.2.1: '4.2' is not a valid value for 'integer'.
cvc-type.3.1.3: The value '4.2' of element 'Length' is not valid.
)
-----------------------------------------------------------------------------
2nd. If i avoid the first error using a product without any decimal, I got this error about the destination postal code but .... how can happen that? the plugin already know the customer country but the customer post code it's not asked yet, it's asked on later steps.
-----------------------------------------------------------------------------
FedEx RESPONSE: Reveal
stdClass Object
(
[HighestSeverity] => ERROR
[Notifications] => stdClass Object
(
[Severity] => ERROR
[Source] => crs
[Code] => 521
[Message] => Destination postal code missing or invalid.
[LocalizedMessage] => Destination postal code missing or invalid.
)

[TransactionDetail] => stdClass Object
(
[CustomerTransactionId] => *** WooCommerce Rate Request ***
)

[Version] => stdClass Object
(
[ServiceId] => crs
[Major] => 22
[Intermediate] => 0
[Minor] => 0
)
)
-----------------------------------------------------------------------------

I hope you can help me.