4D v16.3Error messages |
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4D v16.3
Error messages
Error messages
This section describes the different messages generated by the compiler. These messages are of several different types:
These messages are generated throughout the compilation process. Each message is accompanied here with an example of the problem and, when necessary, an additional explanation. Pointer in COPY ARRAY COPY ARRAY(Pointer->;Array) Pointer in SELECTION TO ARRAY SELECTION TO ARRAY(Pointer->;MyArray) Pointer in ARRAY TO SELECTION ARRAY TO SELECTION(Pointer->;[MyTable]MyField) Pointer in LIST TO ARRAY LIST TO ARRAY(List;Pointer->) Pointer in ARRAY TO LIST ARRAY TO LIST(Pointer->;List) Pointer in an array declaration ARRAY REAL(Pointer->;5) The command ARRAY REAL(Array;Pointer->) does not generate this warning. The value of the dimension of an array does not have any influence on its type. In this example, the array referred to by the pointer must have been defined elsewhere. Pointer in DISTINCT VALUES DISTINCT VALUES(Pointer->;Array) Using the function Undefined is not advised. If(Undefined(Variable)) The Undefined function always returns FALSE in a compiled database. This method is protected by a password. An automatic action button does not have a name in the MyForm form on page X. Assumes that the pointer points to an alphanumeric expression. Pointer->≤2≥:="a" Assumes that the string index is numeric. String≤Pointer->≥:="a" Assumes that the array index is of type real. ALERT(MyArray{Pointer->}) Missing parameter in the plug-in procedure call. WR SET FONT(Area) Note: You can enable and disable warnings individually using the following tags: These messages are generated throughout the compilation process. It is up to you to correct these errors in order to for the compiler to be able to generate a compiled database. Each message is accompanied here with an example of the problem and, when necessary, an additional explanation. Typing The type of the variable is not compatible with the operator. Cannot make an assignment with those types. MyReal:=12.3 Changing the number of dimensions of an array. ARRAY TEXT(MyArray;5;5) Typing conflict on the MyArray variable in the form. ARRAY INTEGER(MyArray) Declaring an array without dimensions. ARRAY INTEGER(MyArray) Variable expected. COPY ARRAY(MyArray;"") The type of Variable is unknown. This variable is used in the method M1. Invalid constant type OK:="The weather is nice" The method M1 is unknown. Incorrect usage of a field. MyDate:=Add to date(BooleanField;1;1;1) The variable Variable is not a method. Variable(1) The variable Variable is not an array. Variable{5}:=12 The result of the function is not compatible with the expression. Text:="Number"+Num(i) The types of the variables used in this expression are not compatible. Integer:=MyDate*Text Changing the type of the variable $i from type Fixed string to type Real. $i:="3" The array index is not a number. IntArray{"3"}:=4 Retyping the variable Variable from type Text to an array of type Text. C_TEXT(Variable) Retyping of the variable Variable from type Text to type Real. Variable:=Num(Variable) Retyping the array MyBoolean from array of type Boolean to variable of type Real. Variable:=MyBoolean Retyping the array IntArray from array of type Integer to array of type Text. ARRAY TEXT(IntArray;12) if IntArray was declared elsewhere as an Integer array. Trying to dereference a variable which is not of type Pointer. Variable->:=5 if Variable is not of the type Pointer. Retyping of the variable Var1 from type Text to type Number. Var1:=3.5 Incorrect usage of a field. Variable:=[MyTable]MyField [MyTable]MyField is a Date field. Variable is of the type Number. Syntax The result of the function is not a pointer. Variable:=Num("The weather is nice")-> It is not possible to dereference this function. Syntax error. If(Boolean) Too many opening curly brackets ({) . Too many closing curly brackets (}).. Closing parenthesis ) expected. Opening parenthesis ( expected. Field expected. If(Modified(Variable)) Opening curly bracket expected. C_INTEGER($ Variable expected. C_INTEGER([MyTable]MyField) Constant number expected. C_INTEGER(${"3"}) Semicolon ; expected. COPY ARRAY(Array1 Array2) Mac OS MyString≤3:="a" Too many closing character reference symbols.
MyString3≥:="a" Windows MyString[[3:="a" Too many closing character reference symbols. MyString 3]]:="a" Did not expect a subtable. ARRAY TO SELECTION(Array;Subtable) The argument of an IF statement must be a boolean. If(Pointer) Expression is too complex. Method is too complex. Unknown field. Unknown table. Pointer to an incorrect expression. Pointer:=->Variable+3 Incorrect usage of string index. MyReal≤3≥or MyReal[[3]] or MyString≤Variable≥or MyString[[Variable]] where Variable is not a Number variable. Parameters The result of this function cannot be passed as a parameter to this method or command. MyMethod(Num(MyString)) if MyMethod expects a Boolean expression. Too many parameters have been passed to this method. DEFAULT TABLE(Table;Form) This value cannot be passed as a parameter to this method or command. MyMethod(3+2) if MyMethod expects a Boolean expression. Function result type conflict. C_INTEGER($0) Generic parameter type conflict. C_INTEGER(${3}) This 4D command does not require any parameters. SHOW TOOL BAR(MyVar) This 4D command requires at least one parameter. DEFAULT TABLE MyString cannot be passed as a parameter to that method. MyMethod(MyString) if MyMethod is expecting a Boolean parameter. The type of the parameter $1 is different in the calling and in the called method. Calculate("3+2") with the directive C_INTEGER($1) in Calculate. One of the parameters in COPY ARRAY is a variable. COPY ARRAY(Variable;Array) Retyping of the variable $1 from type Number to type Text. $1:=String($1) An array cannot be a parameter. ReInit(MyArray) Operators The type of the variable is not compatible with the operator. Bool2:=Bool1+True Addition cannot be performed on Boolean fields. Did not expect the operator >. QUERY(MyTable;[MyTable]MyField=0;>) Cannot compare two variables of those types. If(Number=Picture2) Cannot negate this type of variable.
Boolean:=-False Plug-in Commands The plug-in command PExt does not seem to be correctly defined. Not enough parameters were passed to this plug-in command. Too many parameters were passed to this plug-in command. The plug-in command Variable does not seem to be correctly defined. General Errors Two methods have the same name : Name. Internal error # xx. The variable Variable could not be typed. This variable is used in the method M1. The original method is damaged. Unknown 4D command. Retyping the variable Variable in the form Form. The name of the function Name is also the name of a variable in the form. A method and a variable have the same name : Name. A plug-in command and a variable have the same name : Name. Cannot call a command that is not thread-safe from a method declared as thread-safe. Cannot call 'MethodName' method that is not thread-safe from a method declared thread-safe. These messages are generated in 4D while the compiled database is running. They are displayed in a specific error window. The result is out of range. Division by zero. Var1:=0 Accessing a parameter that does not exist. The pointer is not properly initialized. MyPointer->:=5 if MyPointer has not yet been initialized. The destination string is smaller than the source. C_STRING(MyString1;5) Invalid character reference. i:=-30 The parameter is an empty string. MyString≤1≥:="" Modulo by zero. Var1:=0 Invalid parameters in an EXECUTE command. EXECUTE FORMULA("MyMethod(MyAlpha)") if MyMethod expects a parameter other than an Alphanumeric. Pointer to an unknown variable. MyPointer:=Get pointer("Variable") if Variable does not appear explicitly in the database. Attempting to retype by using a pointer. Boolean:=Pointer-> if Pointer points to a field of type Integer. Bad usage of a pointer or pointer to an unknown variable. Character:=StringVar≤Pointer->≥ if Pointer does not point to a Number.
See also
Optimization Hints
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PROPERTIES
Product: 4D
HISTORY
TAGS warning ARTICLE USAGE
4D Language Reference ( 4D v16) |