Solution : https://service.sap.com/sap/support/notes/459448 (SAP Service marketplace login required)
Summary : 
      The SAP Note addresses an issue in the Product Safety component, specifically within the Specification Management module where the specification read API (Read API C1F2_SUBSTANCES_READ) fails to trigger a warning when the unit of measurement associated with a characteristic value is missing in Customizing. This anomaly is due to a programming error. To rectify, users must install EHS 2.7b Support Package 02 or update the export parameter E_ERROR_MESSAGE in specified function modules via Transaction SE37, followed by implementing the provided correction instructions. Preconditions include installation of EHS 2.7b SP01 and specific prior notes.
Key words : 
specification managementthe specification read api, read api c1f2_substances_read, terms ehs27bsp02psatawe reason, prerequisites causethe problem, 7b support package 01, solution import ehs 2, 7b support package 02, function modules c14k_object_valuations_read, type  esp1_message_wa_typethen implement, export parameter e_error_message
Related Notes : 
       
| 423411 | Corrections EH&S 2.7B: Support Package 02 |