I am running CE8, I turned on loglevel 9 and looked in the wcs and pageserver logs. Pasted below is only valid info to me.
Event Viewer has nothing.
I opened the report in CR8.5 on the server and ran fine.
webcompserver.log
17:15:28 (277, 577), (256, 1, 33011), Info: CSISocket::connectNonBlocking() connection refused 'WSA10061' and doing retry number 0
17:15:29 (277, 577), (256, 1, 33011), Info: GetIORViaTCPIP: Timeout in connecting to server
17:15:29 (277, 577), (256, 1, 33011), Info: SIWarning: ResolveSocket failed!
17:15:33 (277, 408), (256, 1, 33011), Info: SESSIONID: Found session id 1051913721550-106Info: setting cookie <RCOOKIE> to </crystaltest/sla15.rpt>
17:15:21 (277, 614), (256, 1, 33011), Info: WAServer:

ostRequest: Component viewrpt returned error 1
pageserver.log
17:16:33 (222, 617), (256, 1, 33011), Info: procReport.dll: CReportPrintJob:

repareErrorMessage( 40017 ): Error in File sla15.rpt: Error in formula sla15.rpt. Internal error: PEEncapsulatePage
17:16:33 (222, 617), (256, 1, 33011), Info: cipeworker: <10632602291051913733119246415> procReport returned complete
17:16:33 (222, 617), (256, 1, 33011), Info: cipeworker: cookie <#<1063260229105191372111760818>#<02.05.2003 05:14:58#10632602291051913793125224017#10632602291051913733119246415>#prmpt<0> #depsaved<0>> #depparpromp<1>> #deplogon<0>> #isgroupby0>> #closed <0>>
17:16:33 (222, 617), (256, 1, 33011), Info: cipeworker: <10632602291051913733119246415> waiting for requests ...
17:16:33 (222, 125), (256, 1, 33011), Info: ReportPageListenerBase_impl:

ush Success!
17:16:38 (222, 526), (256, 1, 33011), Info: SIHello: reregistering
There were a bunch of these in the pageserver.log
17:15:43 (222, 617), (256, 1, 33011), Info: CReportPrintJob::HandleToString() returns:
Any help would be much appreciated, thanks, mike