Solution : https://service.sap.com/sap/support/notes/678904 (SAP Service marketplace login required)
Key words : 
basis sap web application server 6, sap web application server, sap web application server 6, sap web application server 7, mime cache mime objects, publishing automatically takes place, flow logic-based services, sap@web studio, lower case letters, running iac development
Related Notes : 
       
| 932917 | CLP50: Collaborative Planning on SCM Release 5.0 | 
| 871232 | Where-used list for screens in Internet services | 
| 867694 | Copying a language resource or theme with subobjects | 
| 834852 | Version management for HTML templates | 
| 829310 | SAP@Web Studio no longer supported as of NetWeaver 2004 | 
| 826746 | BWSP: Publication of the ITS BWSP service fails | 
| 778198 | SIAC_XPRA_CONVERT_FROM_4X_64, upgrade to Netweaver 04 | 
| 774148 | SIAC_CONVERT_FROM_4X: Overwriting existing objects | 
| 772108 | WAB: Access to obsolete storage structures after conversion | 
| 769725 | Error during additional read of resource parameters | 
| 759575 | Converting language-dependent MIME objects | 
| 755114 | ERP2004: ISR - Entry using ITS service | 
| 750049 | Basis Internet services, new format | 
| 745916 | Report SIAC_CONVERT_FROM_4X, usability | 
| 745404 | MSS reporting: Conversion of ITS Service HRWPC_FC_EXEC | 
| 743854 | SIAC1: Service delet.; Display - Package, person responsible | 
| 737373 | ITS service CCMP_RABOX missing - conversion needed | 
| 733392 | MIME objects are not copied correctly in SIAC1 | 
| 732334 | Error when uploading parameters | 
| 716064 | Editing language-dependent MIME objects | 
| 704406 | Version management for mime objects | 
| 703187 | Additional line breaks in locally-published templates | 
| 700761 | Error uploading mime objects | 
| 699323 | Error publishing ITS objects | 
| 694571 | Error in version management for IAC templates | 
| 690388 | Publishing on all defined sites does not work | 
| 680176 | IACOR publishing from release Basis 6.40 to standalone ITS | 
| 412202 | Publishing IAC objects in subsequent import processing | 
| 325616 | ITS 6.20 System requirements | 
| 325149 | Publishing IAC objects |