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Hello! I'm adding a MyDACConnection to my form, but when I try to compile, Delphi 7 shows me erros in ZLib.pas unit telling me that some .obj files were not found. The full error is shown like the text below:

[Error] ZLib.pas(226): File not found: 'deflate.obj'
[Error] ZLib.pas(227): File not found: 'inflate.obj'
[Error] ZLib.pas(228): File not found: 'inftrees.obj'
[Error] ZLib.pas(229): File not found: 'trees.obj'
[Error] ZLib.pas(230): File not found: 'adler32.obj'
[Error] ZLib.pas(231): File not found: 'infblock.obj'
[Error] ZLib.pas(232): File not found: 'infcodes.obj'
[Error] ZLib.pas(233): File not found: 'infutil.obj'
[Error] ZLib.pas(234): File not found: 'inffast.obj'
[Error] ZLib.pas(207): Unsatisfied forward or external declaration: 'deflateInit_'
[Error] ZLib.pas(208): Unsatisfied forward or external declaration: 'deflate'
[Error] ZLib.pas(209): Unsatisfied forward or external declaration: 'deflateEnd'
[Error] ZLib.pas(211): Unsatisfied forward or external declaration: 'inflateInit_'
[Error] ZLib.pas(212): Unsatisfied forward or external declaration: 'inflate'
[Error] ZLib.pas(213): Unsatisfied forward or external declaration: 'inflateEnd'
[Error] ZLib.pas(214): Unsatisfied forward or external declaration: 'inflateReset'
[Error] ZLib.pas(236): Unsatisfied forward or external declaration: '_tr_init'
[Error] ZLib.pas(237): Unsatisfied forward or external declaration: '_tr_tally'
[Error] ZLib.pas(238): Unsatisfied forward or external declaration: '_tr_flush_block'
[Error] ZLib.pas(239): Unsatisfied forward or external declaration: '_tr_align'
[Error] ZLib.pas(240): Unsatisfied forward or external declaration: '_tr_stored_block'
[Error] ZLib.pas(241): Unsatisfied forward or external declaration: 'adler32'
[Error] ZLib.pas(242): Unsatisfied forward or external declaration: 'inflate_blocks_new'
[Error] ZLib.pas(243): Unsatisfied forward or external declaration: 'inflate_blocks'
[Error] ZLib.pas(244): Unsatisfied forward or external declaration: 'inflate_blocks_reset'
[Error] ZLib.pas(245): Unsatisfied forward or external declaration: 'inflate_blocks_free'
[Error] ZLib.pas(246): Unsatisfied forward or external declaration: 'inflate_set_dictionary'
[Error] ZLib.pas(247): Unsatisfied forward or external declaration: 'inflate_trees_bits'
[Error] ZLib.pas(248): Unsatisfied forward or external declaration: 'inflate_trees_dynamic'
[Error] ZLib.pas(249): Unsatisfied forward or external declaration: 'inflate_trees_fixed'
[Error] ZLib.pas(250): Unsatisfied forward or external declaration: 'inflate_trees_free'
[Error] ZLib.pas(251): Unsatisfied forward or external declaration: 'inflate_codes_new'
[Error] ZLib.pas(252): Unsatisfied forward or external declaration: 'inflate_codes'
[Error] ZLib.pas(253): Unsatisfied forward or external declaration: 'inflate_codes_free'
[Error] ZLib.pas(254): Unsatisfied forward or external declaration: '_inflate_mask'
[Error] ZLib.pas(255): Unsatisfied forward or external declaration: 'inflate_flush'
[Error] ZLib.pas(256): Unsatisfied forward or external declaration: 'inflate_fast'
[Fatal Error] uRelatorioDespesas.pas(19): Could not compile used unit 'ZLib.pas'

Hello,

Such error occurs when you have another (maybe third-party) ZLib units. MyDAC uses ZLib that is supplied with Delphi. Please check that Delphi Library path does not contain a path to another ZLib units.

Hi AndreyZ, I just removed the line that referenced the directory $(DELPHI)/Source/Common/, this directory contains the ZLib.pas unit. As you told me this error was solved after this fix.

But now when I compile and try to open the Form that contains the report with the MyDAC Components it shows me an EClassNotFoundException telling that the TfrxMyDACQuery was not found.

Note: I already added the path "C:\Users\Public\Documents\Devart\MyDAC for Delphi 7\Demos\ThirdParty\FastReport\FR4\" to the Library Path

Thanks for the help!

Simple to solve. Just added the units frxDACComponents and frxMYDACComponents in the uses clause. Thanks for the help anyway!

Glad to see that the problem was solved. If any other questions come up, please contact us.