Solution : https://service.sap.com/sap/support/notes/530835 (SAP Service marketplace login required)
Key words : 
internet pricing configurator reason, ipc support package level, crm support package level, 1 support package 00 <-> ipc 3, 1 support package 01 <-> ipc 3, 1 support package 02 <-> ipc 3, 1 support package 03 <-> ipc 3, 1 support package 04 <-> ipc 3, 1 support package 05 <-> ipc 3, 1 support package 06 <-> ipc 3
Related Notes : 
       
| 1380797 | SAP CRM 4.0 - SP Stack 17 (12/2009) | 
| 1156745 | CRM 4.0 SP Stack 15 (07/2008) Release & Information Note | 
| 1110853 | CRM 4.0 SP Stack 14 (01/2008) Release & Information Note | 
| 897807 | CRM 3.1 SP Stack 12 (12/2005): Release & Inf. Note | 
| 844193 | CRM 4.0 SP Stack 09 (07/2005) Release & Info. Note | 
| 844192 | CRM 3.1 SP Stack 11 (06/2005): Release & Inf. Note | 
| 835392 | NullPointerException in class GetItemInfo | 
| 814564 | ClassCastException in class PricingDocument | 
| 797957 | CRM 3.1 SP Stack 12/2004 (SAPKU31010): Release & Inf. Note | 
| 797340 | CRM 4.0 SP Stack 1/2005 (SAPKU40008): Release & Info. Note | 
| 775288 | Error in RFCCommands.xml when you use the GetKnowledgeBase c | 
| 772709 | Performance optimization of IPC pricing | 
| 772701 | NullPointerException in the GetItemInfo class | 
| 761607 | CRM 4.0 SP Stack 9/2004 (SAPKU40007): Release & Info. Note | 
| 759557 | Incorrect specification of the scale base value | 
| 755934 | CRM 3.1 SP Stack 07/2004 (SAPKU31009): Release & Info. Note | 
| 754723 | CRM 4.0 SP Stack 9/2004 Support Release 1: Release Note | 
| 743291 | CRM 4.0 SP Stack 6/2004 (SAPKU40006): Release & Info. Note | 
| 726270 | SRM 3.0 SP06: Release and information note | 
| 718779 | New standard copying routines in the IPC | 
| 715118 | Improved error handling in condition display (MSA) | 
| 711716 | CRM 3.1 SP Stack 03/2004 (SAPKU31008): Release & Info. Note | 
| 709921 | CRM 4.0 SP Stack 4/2004 (SAPKU40005): Release & Info. Note | 
| 696262 | CRM 4.0 SP Stack 1/2004 (SAPKU40004): Release & Info. Note | 
| 692671 | IPC exceptions with manual conditions in MSA | 
| 692393 | Quantity conversions after loading in the IPC not correct | 
| 683842 | CRM 3.1 SP Stack 12/2003 (SAPKU31007): Release & Info. Note | 
| 682707 | NullPointer TTEKernel or JavaOutOfMemory if TTE is inactive | 
| 681684 | Incorrect quantity conversions in the IPC | 
| 677456 | SAPKU40003: Support Package 03 for CRM 4.0 | 
| 677063 | IPC server crashes and is restarted | 
| 669830 | Unnecessary re-determination of condition rate for scales | 
| 663180 | Support Release 01 for CRM 3.1 | 
| 653691 | SAPKU31006: Support Package 06 for CRM 3.1 | 
| 651069 | SAPKU40002: Support Package 02 for CRM 4.0 | 
| 634869 | SAPKU40001: Support Package 01 for CRM 4.0 | 
| 624610 | Deletion of item totals on header level | 
| 624233 | Problems with CRM IPC Release 4.0 | 
| 620616 | Memory leak when running TTE with big order | 
| 617349 | Mandatory pricing conditions | 
| 614812 | 'ClassCastException' after saving an order | 
| 611976 | Subsequent setting of the pricing procedure II | 
| 610994 | SAPKU31004: Support Package 04 for CRM 3.1 | 
| 606576 | Upper/lower limits for header conditions | 
| 602118 | GetPricingItemInfo: NullPointerException | 
| 600532 | Incorrect group processing | 
| 599927 | SXE log error: SXEInconsistentException | 
| 599326 | Subtotal lines on header level | 
| 598613 | ItemUserExits are not processed during copying | 
| 596425 | No tax document in Web Shop | 
| 596391 | Incorrect assignment of pricing data | 
| 595772 | Return container in IPC user exits | 
| 593892 | Setting the pricing procedure subsequently | 
| 591018 | Field COPY_ROUTINE in SAP Mobile Sales | 
| 589174 | Incorrect condition rate for KUMU conditions | 
| 588067 | IPC: error in pricing "java.lang.ClassCastException...." | 
| 587541 | Manually changed/entered variant conditions | 
| 587218 | SAPKU31003: Support Package 03 for CRM 3.1 | 
| 580235 | Terms of payment determination on item level | 
| 577504 | ISA: When you display old documents, the net value is 0.00 | 
| 574775 | Problems with items with the same external number | 
| 574705 | Long response time of the IPC | 
| 573398 | JCO update for CRM 3.0 SP9-SP13 and related CRM/SRM versions | 
| 571113 | Pricing for large documents takes very long | 
| 570926 | Condition values are 'zero' after loading an order | 
| 570855 | Subtotal incorrect after the import of an order | 
| 570833 | Tax conditions are replicated II | 
| 570814 | Exclusion groups are not cleared correctly | 
| 567270 | Tax conditions are replicated | 
| 566046 | Duplication conditions displayed more than once | 
| 565757 | Group condition has incorrect condition basis | 
| 565640 | SAPKU31002: Support Package 02 for CRM 3.1 | 
| 559866 | FAQ: tips & tricks for the IPC installation | 
| 559847 | Calculation formula 18 does not work properly | 
| 553272 | Pricing with variant conditions takes much time | 
| 551215 | Subtotals of statistical items on header level | 
| 549831 | Rounding difference clearing incompatibly with R/3 | 
| 549146 | Customer-specific subtotal is not defined | 
| 547705 | SAPKU31001: Support Package 01 for CRM 3.1 | 
| 546541 | No pricing after changing a group condition | 
| 546483 | No prices are found in product catalog | 
| 413617 | IPC Installation 3.0 |