This a typical "but I don't have changed anything" case. I have query,
which has been working for years and now I get the error:

Unsuccessful execution caused by an unavailable resource.
Implementation limit exceeded.
block size exceeds implementation restriction.

The statement is definitely not bigger than 64KB. I run FB 1.5 on
Windows XP. Here's the statement:

insert into PRODUCTS
(PCID,PCPAID,PCMPID,PCSPID,PCGEID,PCPUID,PCUNID1,PCUNID2,
PCRTID,PCCCID,PCMNID1,PCMNID2,PCPGID,PCNR,PCNAME1,PCUPC,PCAVAILABILITY,PCDELIVERYQUANTITY,
PCPACKETQUANTITY,PCCOPYPROTECTION,
PCTRANSFERPRICE,PCNETPRICE,PCLISTPRICE,PCRRP,
PCTRANSFERPRICE_CC,PCNETPRICE_CC,PCLISTPRICE_CC,PCRRP_CC,
PCDAYONE,PCLIFETIME,PCTARGETRELEASEDATE,PCACTUALRELEASEDATE,PCDELIVERYTIME,PCBUNDLE,
PCDYNAMICFORECAST,PCFORECAST1,PCFORECAST2,PCFORECAST3,PCFORECAST4,PCFORECAST5,PCFORECAST6,
PCFORECAST7,PCFORECAST8,PCFORECAST9,PCFORECAST10,PCFORECAST11,PCFORECAST12,
PCCOMMISSION,PCCOMMISSIONYEAR,
PCAMNESTY,PCAMNESTYYEAR,PCPRICEGROUP,
PCUKID,PCCOMMISSION_BUNDLE,PCCOMMISSION_PERFORMANCE1,PCCOMMISSION_PERFORMANCE2,
PCCOMMISSION_PERFORMANCE3,PCCOMMISSION_FACTOR1,PCCOMMISSION_FACTOR2,
PCCOMMISSION_FACTOR3,PCACTIVE,PCONEFORECAST,PCSTRATEGYBONUSQUANTITY,
PCSB_ONLY_RELEASEMONTH,PCSB_FROM_YEAR,PCSB_UNTIL_YEAR,
PCSB_FROM_MNID,PCSB_UNTIL_MNID,PCMINSTOCKQUANTITY,PCMINORDERQUANTITY,
PCIGNOREATFORECASTSPLITBUNDLES,PCCANCELED,PCPOID400,PCPOID500,PCPOID600,
PCCommissionUseWidthDistr,PCCommissionMinWidthDistr,PCCommissionMinSales,
PCCOMMISSIONWIDTHDISTRFORALLUS,PCVisible)
values
(:PCID ,:PCPAID ,:PCMPID ,:PCSPID ,:PCGEID ,:PCPUID ,:PCUNID1
,:PCUNID2 ,
:PCRTID ,:PCCCID ,:PCMNID1 ,:PCMNID2 ,:PCPGID ,:PCNR ,:PCNAME1
,:PCUPC ,:PCAVAILABILITY ,:PCDELIVERYQUANTITY ,
:PCPACKETQUANTITY ,:PCCOPYPROTECTION ,
(select RESULT1 from P_CALCULATE_CC_TO_EURO(:PCTRANSFERPRICE
,NULL,NULL,NULL,NULL)),
(select RESULT1 from P_CALCULATE_CC_TO_EURO(:PCNETPRICE
,NULL,NULL,NULL,NULL)),
(select RESULT1 from P_CALCULATE_CC_TO_EURO(:PCLISTPRICE
,NULL,NULL,NULL,NULL)),
(select RESULT1 from P_CALCULATE_CC_TO_EURO(:PCRRP ,NULL,NULL,NULL,NULL)),
:PCTRANSFERPRICE_CC ,:PCNETPRICE_CC ,:PCLISTPRICE_CC ,:PCRRP_CC ,
:PCDAYONE ,:PCLIFETIME ,:PCTARGETRELEASEDATE ,
:PCACTUALRELEASEDATE ,:PCDELIVERYTIME ,:PCBUNDLE ,:PCDYNAMICFORECAST
,:PCFORECAST1 ,:PCFORECAST2 ,
:PCFORECAST3 ,:PCFORECAST4 ,:PCFORECAST5 ,:PCFORECAST6 ,:PCFORECAST7
,:PCFORECAST8 ,:PCFORECAST9 ,
:PCFORECAST10 ,:PCFORECAST11 ,:PCFORECAST12 ,:PCCOMMISSION
,:PCCOMMISSIONYEAR ,
:PCAMNESTY ,
:PCAMNESTYYEAR ,:PCPRICEGROUP ,:PCUKID ,:PCCOMMISSION_BUNDLE ,
:PCCOMMISSION_PERFORMANCE1 ,:PCCOMMISSION_PERFORMANCE2 ,
:PCCOMMISSION_PERFORMANCE3 ,:PCCOMMISSION_FACTOR1
,:PCCOMMISSION_FACTOR2 ,
:PCCOMMISSION_FACTOR3 ,:PCACTIVE ,:PCONEFORECAST
,:PCSTRATEGYBONUSQUANTITY ,
:PCSB_ONLY_RELEASEMONTH ,:PCSB_FROM_YEAR ,:PCSB_UNTIL_YEAR ,
:PCSB_FROM_MNID ,:PCSB_UNTIL_MNID ,:PCMINSTOCKQUANTITY
,:PCMINORDERQUANTITY ,
:PCIGNOREATFORECASTSPLITBUNDLES ,:PCCANCELED ,:PCPOID400 ,:PCPOID500
,:PCPOID600 ,
:PCCommissionUseWidthDistr ,:PCCommissionMinWidthDistr
,:PCCommissionMinSales ,
:PCCOMMISSIONWIDTHDISTRFORALLUS ,:PCVisible )

Any ideas, what can cause the error?

Regards

Guido