> {quote:title=Nelson Nepomuceno wrote:}{quote}
> Hi Sriram, thank you for answering promptly.
> 
> I think my database is not read only. Because I can change it from my windows application and from my admin tool.
> Command gstat -h mydatabase.ib returns:
> 
> Database header page information:
>         Flags                   0
>         Checksum                12345
>         Write timestamp         Oct 19, 2013 18:11:42
>         Page size               4096
>         ODS version             15.0
>         Oldest transaction      1403
>         Oldest active           1404
>         Oldest snapshot         1404
>         Next transaction        1407
>         Sequence number         0
>         Next attachment ID      0
>         Implementation ID       16
>         Shadow count            0
>         Page buffers            0
>         Next header page        0
>         Database dialect        3
>         Creation date           Sep 18, 2013 12:37:28
>         Attributes              force write
> 
>     Variable header data:
>         *END*
> 
> I did not see any information about read only or deploy as read only.
> My Admin application shows database as not read only.
> 
> 
> I use Delphi Project Deployment Page to deploy database file. I don't know if it haves a feature to change database status to read only or change file status to read only. Is there anyone?
> I suspected that deploy path could be read only or need some attribute to enable changes in files. I don't know.
> The problem is not a Android specific, because it happens in iOS too. I checked if Android "Uses Permissions" is set properly to allow "Read/Write external storage" and it is.
> 
> 
> 
> The problem is not FireDAC specific, because occurs with IBX too (sorry I tested with IBX instead dbExpress).
> I compiled and deployed the same application source to Windows, iOS and Android. In Windows works fine and I can change database. But in iOS and Android data can't be change. So, I suppose error is not in connection, transaction or dataset components.
> 
> 
> 
> I use some specific code to connect database in iOS and Android (using FireDAC):
> 
> {code}
> procedure Tdtm.conIBBeforeConnect(Sender: TObject);
> begin
>   {$IF DEFINED(IOS) or DEFINED(ANDROID)}
>   conIB.Params.Values['DriverName'] := 'IB';
>   conIB.Params.Values['Protocol'] := 'Local';
>   conIB.Params.Values['Server'] := '';
>   conIB.Params.Values['Database'] := TPath.Combine(TPath.GetDocumentsPath, 'MyDatabase.IB');
>   {$ENDIF}
> end;
> 
> constructor Tdtm.Create(AOwner: TComponent);
> begin
>   inherited;
>   {$IF DEFINED(IOS) or DEFINED(ANDROID)}
>   conIB.DriverName := 'IB';
>   {$ENDIF}
> end;
> {code}
> 
> Could be something wrong here?
> 
> 
> 
> The problem continues.
> If you have some other idea, please answer.
> 
> Thank you.
> 
> Best regards.
> 
> > {quote:title=Sriram Balasubramanian wrote:}{quote}
> > Nelson,
> > 
> > If it was just Android platform having the problem, I would have recommended that you make sure your "Uses Permissions" is set properly to allow "Read/Write external storage", as per http://docwiki.embarcadero.com/RADStudio/XE5/en/Mobile_Tutorial:_Using_InterBase_ToGo_(iOS_and_Android)
> > 
> > Your destination folders for the database files are also good (for iOS and Android).
> > 
> > Your report indicates it is not FireDAC specific and happens with dbExpress as well.
> > 
> > The only other advise I have is to check your database file mode. Is it set to "read only"? InterBase allows deploying "read only" (gfix -mode read_only foo.ib) databases. Such a database will not allow "write" operations (proved by your read queries executing fine but not write operations). You can check the attributes of your database file on Windows using "gstat -h foo.ib"
> > 
> > I don't know if you are using any FireDAC and/or dbExpress data aware components that don't implicitly allow "write" operations.
> > For FireDAC: 
> > - check if CheckReadOnly is true. http://docwiki.embarcadero.com/Libraries/XE5/en/FireDAC.Stan.Option.TFDUpdateOptions.CheckReadOnly
> > - check if your transaction is set to ReadOnly: http://docwiki.embarcadero.com/Libraries/XE5/en/FireDAC.Stan.Option.TFDTxOptions.ReadOnly
> > 
> > For dbExpress:
> > - check if you are setting poReadOnly property to true if you using a data set provider. http://docwiki.embarcadero.com/RADStudio/XE5/en/Setting_Options_That_Influence_the_Data_Packets
> > 
> > Best wishes,
> > Sriram
> > 
> > 
> > > {quote:title=Nelson Nepomuceno wrote:}{quote}
> > > Hello,
> > > 
> > > I created a simple mobile application that access IBToGo.
> > > When I deploy to mobile I can query data, but I can't do any change (insert, update or delete). Application always gives a exception EIBNativeException: [FireDAC][Phys][IB] Feature is not supported.
> > > The problem is the same changing data via dbExpress or FireDAC; deploying default IBToGo or IBLite license file; deploying to iOS or Android; and compiling and deploying with Delphi XE4 Enterprise (full license) (only for iOS) or Delphi XE5 Enterprise (Trial) (iOS or Android).
> > > 
> > > Interbase version is XE3 installed together Delphi.
> > > 
> > > My database is deployed in iOS to path StartUp\Documents\; and in Android to path assets\internal\
> > > 
> > > What could be wrong?
> > > 
> > > Thanks in advance