Functions of DLL Labview only each returns 0 when it is called in C

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• Get the 1097 error when trying to call a Labview DLL

  I had to write a wrapper DLL to use some functions in the DLL to a third party, and I'm having a few problems. I created an executable to test my code and it works fine, but when I try to execute the same function in the DLL that I created in Labview, I get error 1097. I read through most of the posts on this forum about this issue, but none of the proposed solutions are working for me. I'm sure this isn't a question of transfer settings to COLD LAKE because I changed the function so it only accepts a single entry (a number he obtains from a Subvi, which came from the third-party DLL, this entry is working with a bunch of other functions, so I don't think that is the question).

  I have attached the C code that creates the wrapper, but I don't know how it is useful without familiarity with the functions of the original DLL. I hope that someone can spot something basic I am out of my code, but please let me know if I need to call something else.

  I use a Labview 32 bit version 2012 on a 64-bit Windows 7 computer.

  Thanks in advance for any help!

  You should read the documentation on LoadLibrary() and understand. Essentially if you provide a full path to LoadLibrary() the DLL MUST be present at this place so that LoadLibrary() will succeed. If you pass only the name Windows DLL will ONLY search in these places:

  (1) if the module (the DLL) is already loaded it will return a handle to the loaded module and increment its reference count

  (2) if the referencing module contains a manifest (either incorporated into the image module or in a separate manifest file in the same directory as the executablemodule) specyfying a version number for this DLL will load this DLL with this version of the SxS (side by side) location and failure if it is not present

  (3) if the executable load contains a manifest (either incorporated in the executable file or in a separate manifest file in the same directory as the executable file) number specyfying a version for this DLL, it will load this DLL with this version of the location of SxS (side by side) and fail if it is not present

  (4) it will search for the DLL in the same directory as the directory where the current image of the process is loaded. It is NOT the directory of the DLL loading the DLL, BUT the directory where the EXE file from which the process was created.

  (5) in the system directory

  (6) in the Windows directory

  (7) any directory in the PATH environment variable

  (8) the path of current directory which is a location managed by windows by process and changed the two explicitedly when the application calls the API SetCurrentDirectory() but also implicitedly by things like the file selection dialog whenever it is rejected by other means than the undo operation.

  Essentially putting your dependend DLL in the same directory as the wrapper DLL does NOT work when you use the name of the DLL only UNLESS you place the two DLLs in the same directory as your executable file. If you don't want this restriction and want to be able to move these modules together in different directories, you don't have to create the correct path in your wrapper to LoadLibrary(). Basically, you must have the code to determine the location of your DLL wrapper path and then strip her own name and add the DLL name wrapped in it and then move to the LoadLibrary().

  There are several ways to determine the path of the current module. The simplest if you don't mind having the name hard-coded in your code DLL would be to ask GetModuleFileName (GetModuleHandle ("yourDLLname"), buffer, size).

• Is the fopen() function works in labview?

  Hi gentlemen...

  I used the fopen() function in labview, it does not work. Is that I can use the fopen() function works in labview?

  Please help me as I'm new to labview.

  Thanks in advance

  Can you give us a description of how you try to do this?

  You realize that LabVIEW is not based on text, no?

  Looking just for another equivalent method? http://zone.NI.com/reference/en-XX/help/371361J-01/lvprop/vi_open_front_panel/

• Why my function returns nothing when I create as a schema object

  I have the ABC's of the user who owns several paintings, some of which have foreign key constraints.

  I have user XYZ who has access to all the tables belonging to the user ABC.

  When I create a user XYZ feature to use more I get no return when I run:

  Select XYZ.ztm_tables_depended_on ('ABC', 'A_TABLE_OWNED_BY_ABC') of double:

  Please see after the function definition.

  CREATE or REPLACE FUNCTION ZTM_TABLES_DEPENDED_ON (p_Owner VARCHAR2, nom_table_p VARCHAR2) RETURN VARCHAR2 IS

  CURSOR C1 IS

  SELECT CONSTRAINT_NAME, OWNER, R_CONSTRAINT_NAME, R_OWNER

  OF ALL_CONSTRAINTS

  WHERE OWNER = p_Owner

  AND TABLE_NAME = nom_table_p

  AND CONSTRAINT_TYPE = 'R '.

  ORDER BY OWNER, CONSTRAINT_NAME, R_OWNER, R_CONSTRAINT_NAME;

  --

  v_Referenced_Owner VARCHAR2 (31);

  v_Ret_Val VARCHAR2 (4000);

  --

  The FUNCTION CONSTRAINT_TABLE_NAME(p_Owner VARCHAR2, p_Constraint_Name VARCHAR2) RETURN VARCHAR2 IS

  CURSOR C1 IS

  SELECT TABLE_NAME

  OF ALL_CONSTRAINTS

  WHERE OWNER = p_Owner

  AND the argument CONSTRAINT_NAME = p_Constraint_Name;

  --

  v_Ret_Val ALL_CONSTRAINTS. TABLE_NAME % TYPE;

  BEGIN

  OPEN C1;

  FETCH C1 INTO v_Ret_Val;

  CLOSE C1;

  --

  RETURN v_Ret_Val;

  END;

  --

  BEGIN

  FOR R IN C1 LOOP

  IF (R.OWNER <>R.R_OWNER) THEN v_Referenced_Owner: = R.R_OWNER | '.';

  ANOTHER v_Referenced_Owner: = NULL;

  END IF;

  --

  v_Ret_Val: = v_Ret_Val | ', ' || v_Referenced_Owner | CONSTRAINT_TABLE_NAME (R.R_OWNER, R.R_CONSTRAINT_NAME);

  END LOOP;

  --

  RETURN LTRIM (v_Ret_Val, ',');

  END;

  /

  But if I enter the function within an anonymous block as follows, I get results:

  DECLARE
  CURSOR C1 IS
  Select owner, table_name
  From all_tables where owner = 'ABC ';

  --

  The FUNCTION ZTM_TABLES_DEPENDED_ON(p_Owner VARCHAR2, p_Table_Name VARCHAR2) RETURN VARCHAR2 IS
  CURSOR C1 IS
  SELECT CONSTRAINT_NAME, OWNER, R_CONSTRAINT_NAME, R_OWNER
  OF ALL_CONSTRAINTS
  WHERE OWNER = p_Owner
  AND TABLE_NAME = nom_table_p
  AND CONSTRAINT_TYPE = 'R '.
  ORDER BY OWNER, CONSTRAINT_NAME, R_OWNER, R_CONSTRAINT_NAME;
  --
  v_Referenced_Owner VARCHAR2 (31);
  v_Ret_Val VARCHAR2 (4000);
  --
  The FUNCTION CONSTRAINT_TABLE_NAME(p_Owner VARCHAR2, p_Constraint_Name VARCHAR2) RETURN VARCHAR2 IS
  CURSOR C1 IS
  SELECT TABLE_NAME
  OF ALL_CONSTRAINTS
  WHERE OWNER = p_Owner
  AND the argument CONSTRAINT_NAME = p_Constraint_Name;
  --
  v_Ret_Val ALL_CONSTRAINTS. TABLE_NAME % TYPE;
  BEGIN
  OPEN C1;
  FETCH C1 INTO v_Ret_Val;
  CLOSE C1;
  --
  RETURN v_Ret_Val;
  END;
  --
  BEGIN
  FOR R IN C1 LOOP
  IF (R.OWNER <>R.R_OWNER) THEN v_Referenced_Owner: = R.R_OWNER | '.';
  ANOTHER v_Referenced_Owner: = NULL;
  END IF;
  --
  v_Ret_Val: = v_Ret_Val | ', ' || v_Referenced_Owner | CONSTRAINT_TABLE_NAME (R.R_OWNER, R.R_CONSTRAINT_NAME);
  END LOOP;
  --
  RETURN LTRIM (v_Ret_Val, ',');
  END;

  --

  BEGIN
  FOR R IN C1 LOOP
  DBMS_OUTPUT. Put_line (ztm_tables_depended_on (R.Owner, R.Table_Name));
  END LOOP;
  END;
  /

  Any ideas what is happening here?

  Any ideas what is happening here?

  Justin said the likely reason.

  See the section "How to exercise roles in PL/SQL blocks" the doc of database security for details

  http://docs.Oracle.com/CD/E25054_01/network.1111/e16543/authorization.htm#i1007304

  Operation of the roles in PL/SQL blocks

  The use of roles in a PL/SQL block depends on if it is an anonymous block, or a block named (stored procedure, function, or trigger), and if it runs with the rights of the author or the rights of the applicant.

  Roles used in the appointed with rights to define blocks

  All roles are disabled in any PL/SQL block named (stored procedure, function, or trigger) that runs with the rights of the author. Roles are not used to privilege control, and you cannot define roles within the procedure of a DEFINER rights.

  The SESSION_ROLES view shows all roles that are currently enabled. If a named PL/SQL block that runs with Definer Rights queries SESSION_ROLES , then the query will return no rows.

  Roles used in blocks named with the rights of the plaintiff and anonymous PL/SQL

  Named PL/SQL blocks that run with the rights of the applicant and the anonymous PL/SQL blocks are executed at the end of the privileges granted through active roles. Current roles are used for verification within rights Summoner of privilege the PL/SQL block. You can use dynamic SQL statements to define a role in the session.

  See this line beginning by "all roles are disables in any PL/SQL block named"?

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  Thank you!

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  Hello

  I have a vi that seeks VISA resources and focuses on their name of the interface to select that you connect to.

  I have a strange problem where, if I run the vi in labview it works fine. When the vi is compiled into an exe file, it does not work.

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