You cannot use different material categories in one composition

<LB>&CAUSE&</>
One composition in the product structure contains different material
categories. The IMDS does not allow such structures.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Note:
Basic materials and surfaces are both handled by the IMDS system as
object type <ZH>material</>. Therefore basic materials and surfaces can
be stored on the same level in the SAP system.
Products and Bulks can exist on the same level in the SAP system. During
the XML generation for IMDS, a dummy node is inserted for the bulk. The
dummy node has the material category product and product part (MAT_PART)
and consists of the bulk.
Example, when working with bulk:
Displayed product structure in the SAP system:
Level,,material,,quantity,,mass,,
Level 1,,Product A,,1 piece,,weight 15 g
Level 2,,Product B,,1 piece,,weight 10 g
Level 2,,Bulk X,,weight 5 g,,- - -
Product structure in the XML file that is uploaded to IMDS:
Level,,material,,quantity,,mass,,
Level 1,,Product A,,1 piece,,weight 15 g
Level 2,,Product B,,1 piece,,weight 10 g
Level 2,,Product C as dummy,,1 piece,,weight 5 g
Level 3,,Bulk X,,weight 5 g,, - - -

System Response

INCLUDE EHPRC_IMDS_MESSAGE_RESPONSE OBJECT DOKU ID TX

How to fix this error?

Correct the product structure.

Procedure for System Administrators

INCLUDE EHPRC_CPM_CHECK OBJECT DOKU ID TX
IMDS 2047.
INCLUDE EHPRC_IMDS_MESSAGE_WORDING OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.