Can't evaluate expressionin IDE debug mode
in [VB.NET]
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From: Saga on 27 Apr 2010 15:16 So I am stepping through my program and I either hover or select an expression and hit F9 and its value is displayed, but then in some cases I get this message: "Cannot evaluate expression because we are stopped in a place where garbage collection is impossible, possibly because the code of the current method may be optimized." I searched for it and got various hits, some of them useful, but not enough to solve my problem. I have never encountered this message before. The only difference for this specific routine is that I copied and pasted it from a VB6 project. Initially it had lots of errors (102 to be exact), but I changed the code accordingly and got it down to 0 errors. For example, I get the message on this line: begin.dteBegDate = DateSerial(CInt(strAr(2).Substring(strAr(2).Length() - 2, 2)), _ CInt(strAr(2).Substring(0, 2)), CInt(strAr(2).Substring(2, 2))) Where strAr(2) is "042710". If I highlight any of the following line and hit F9 I get the message: strAr(2).Substring(strAr(2).Length() - 2, 2) or cint(strAr(2).Substring(strAr(2).Length() - 2, 2)) or BData.dteBegDate But if I highlight the following line I get the value correctly: BData.strVehicleId = strAr(4).Trim() BData is a structure. I already checked the JIT suppress option as recommended by the information that I found, but this does not seem to be the issue. I suspect that some of my .NET code may not be up to spec. Any suggestions are welcomed. Thank you, Saga
From: Tom Shelton on 27 Apr 2010 16:12 On 2010-04-27, Saga <antiSpam(a)nowhere.com> wrote: > So I am stepping through my program and I either hover > or select an expression and hit F9 and its value is displayed, > but then in some cases I get this message: > > "Cannot evaluate expression because we are stopped in a > place where garbage collection is impossible, possibly because > the code of the current method may be optimized." > Are you stepping through in debug mode? There are various things that will not work properly if you are steping through in Release mode... -- Tom Shelton
From: Saga on 27 Apr 2010 16:38 Thank you for the reply. I could not find where to verify the mode that my project was in. Ifianlly found that the "Show advanced build configurations" checkbox needed to be checked :-) Anyways, I checked and the rpojcect is in Debug mode. Regards, Saga "Tom Shelton" <tom_shelton(a)comcastXXXXXXX.net> wrote in message news:Oj%23irXk5KHA.1888(a)TK2MSFTNGP05.phx.gbl... > On 2010-04-27, Saga <antiSpam(a)nowhere.com> wrote: >> So I am stepping through my program and I either hover >> or select an expression and hit F9 and its value is displayed, >> but then in some cases I get this message: >> >> "Cannot evaluate expression because we are stopped in a >> place where garbage collection is impossible, possibly because >> the code of the current method may be optimized." >> > > Are you stepping through in debug mode? There are various things that > will > not work properly if you are steping through in Release mode... > > -- > Tom Shelton
From: Saga on 28 Apr 2010 14:32 Any chance that using Dateserial() function could be causing this? Is there a better way to assign a date value to a date variable when I have the year, month and day in separate integer variables? Saga "Saga" <antiSpam(a)nowhere.com> wrote in message news:%23Xz9t4j5KHA.3804(a)TK2MSFTNGP05.phx.gbl... > So I am stepping through my program and I either hover > or select an expression and hit F9 and its value is displayed, > but then in some cases I get this message: > > "Cannot evaluate expression because we are stopped in a > place where garbage collection is impossible, possibly because > the code of the current method may be optimized." > > I searched for it and got various hits, some of them useful, > but not enough to solve my problem. I have never encountered > this message before. The only difference for this specific routine > is that I copied and pasted it from a VB6 project. Initially it had > lots of errors (102 to be exact), but I changed the code accordingly > and got it down to 0 errors. > > For example, I get the message on this line: > > begin.dteBegDate = DateSerial(CInt(strAr(2).Substring(strAr(2).Length() - > 2, 2)), _ > CInt(strAr(2).Substring(0, 2)), > CInt(strAr(2).Substring(2, 2))) > > Where strAr(2) is "042710". If I highlight any of the following line and > hit F9 I get > the message: > > strAr(2).Substring(strAr(2).Length() - 2, 2) > or > cint(strAr(2).Substring(strAr(2).Length() - 2, 2)) > or > BData.dteBegDate > > But if I highlight the following line I get the value correctly: > > BData.strVehicleId = strAr(4).Trim() > > BData is a structure. I already checked the JIT suppress option as > recommended > by the information that I found, but this does not seem to be the issue. I > suspect > that some of my .NET code may not be up to spec. Any suggestions are > welcomed. > Thank you, Saga > > >
From: Armin Zingler on 28 Apr 2010 15:06
Am 28.04.2010 20:32, schrieb Saga: > Any chance that using Dateserial() function could be causing > this? Can't answer this one but... > Is there a better way to assign a date value to a date > variable when I have the year, month and day in separate > integer variables? d = New Date(year, month, day) -- Armin |